Beginner Seasoned
Pick your zone and the dates re-calibrate.
The Guide Crops Vol. 003

Shallot

in Zone 9, this week

A shallot is a small, mild onion relative that grows in a cluster. Here is the fun part: you plant one little bulb (called a set) and it splits underground into a bunch of 6 to 12 bulbs, so you dig up a whole clump from each one you planted. Shallots taste sweeter and gentler than regular onions, with a hint of garlic, and they keep for many months once dried. They are the same species as the onion, so like onions they start making bulbs based on how long the days are, not on the calendar. The traditional kinds grown from sets are easygoing about this, but it still helps to pick a type suited to where you live. Give them rich, loose soil and full sun, water them steadily, and they are one of the easiest alliums to grow. Shallot (Allium cepa, Aggregatum group) is a cool-season allium grown for the small, fine-grained bulbs prized for their mild, sweet, faintly garlicky flavor. Its signature is multiplication: plant one set and it divides underground into a cluster of 6 to 12 bulbs, so you lift a whole clump where an onion gives a single bulb. Like the bulb onion it shares a species with, shallot is photoperiodic, a cluster sizes up only once day length crosses a cultivar threshold, which is why the right type tracks your latitude. Traditional set-grown shallots are more forgiving about day length than seed onions, but matching the type to your region still pays off. Grow it like an onion otherwise: a heavy-feeding, shallow-rooted plant in loose, fertile soil, kept evenly moist while the clump fills, then eased off water as the tops fall to begin curing. Well-cured shallots store for months, often longer than onions.

Shallot mature plant
Fig. 01 · Shallot, mature Zone 9
Mature in
90-120d
from transplant
Sunlight
Full sun
6-10 hrs daily
Water
Consistent
12 inches / week
Spacing
3 to 6 in
between plants
Soil pH
6-7
slightly acidic
Today · in your zone

What's happening right now

October 21 · Zone 9 · Stage 01 · Sprouting & Emergence

Off-season for shallot in zone 9.

Seasoned
Microclimate · Zone 9a vs 9b

Your zone, at a finer grain

Zone 9 averages a last frost around March 1. Within Zone 9, the colder half (9a, winters down to 20°F) runs about a week later. The warmer half (9b, winters down to 25°F) runs about a week earlier. The plant app picks your subzone from your ZIP.

SubzoneLast springFirst fallGrowing daysWinter minFruits reliably
9aMar 8Nov 24~26120-25°FYes · two seasons
9bFeb 28Nov 30~27525-30°FYes · two seasons

Averages from 8 weather stations per subzone, drawn from NOAA 1991-2020 Climate Normals. Your actual frost date can vary by up to two weeks based on elevation, proximity to water, and local topography.

Source: NOAA 1991-2020 Climate Normals Methodology
Your climate region in Zone 9
Day length, not the calendar

Pick the right shallot for Zone 9

Shallots are the same species as onions, so like onions they decide to start making bulbs based on how long the days are, not on a date. The types are sorted the same way: long-day kinds suit the North, short-day kinds suit the South (where they are planted in fall or winter), and intermediate kinds suit the middle of the country. One nice thing: the traditional shallots grown from sets are more easygoing about day length than seed onions, so they are forgiving for beginners. Still, picking a type that matches where you live gives you the fullest clumps. Day length decides when the bulbs form, but it does not change when you plant, which still depends on frost and soil temperature.Shallot is the same species as the bulb onion (Allium cepa), so it is photoperiodic: the clump stops adding leaves and starts dividing into bulbs only once day length crosses a cultivar threshold. Types fall into the same classes by latitude, long-day at 14 to 16 hours, intermediate-day at 12 to 14 hours, and short-day at 10 to 12 hours. Long-day types fit northern latitudes, short-day types fit the South where they are fall or winter planted, and intermediate types span the middle. One important nuance: traditional set-grown shallots are widely reported as more day-length forgiving, closer to day-neutral, than seed onions, while modern seed-grown hybrids behave like day-length-typed onions. Matching the type to your latitude still gives the fullest clumps. Day length triggers bulbing only; it never moves your planting date, which stays anchored to frost and soil temperature.

Grow in your area
Intermediate-day shallots

Intermediate-day shallots suit the middle of the country, and most set shallots do well here. They are easygoing about day length, so this is a forgiving spot to grow them.These central latitudes suit intermediate-day shallots, which bulb around 12 to 14 hours. Most widely sold set shallots adapt well here, and the day-length response is genuinely soft for the set types.

Intermediate-dayfor your area
Dutch Yellowall-purpose storage (sets)
French Redculinary classic (sets)
Zebruneelongated mild (seed or sets)
Gray Grisellegourmet flavor (sets)
Long-day
Conservorlong-storage hybrid (seed)
Ambitionall-purpose hybrid (seed)
Short-day
Southern multipliermild-winter clumping (sets)
The season at a glance

Planting calendar

In Zone 9, shallot can be planted October through March. Harvest runs June through July.

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
plant
plant
plant
plant
too late
too late
too late
too early
too early
too early
plant
plant
plant
harvest
harvest
harvest
indoors
plant out
harvest
Shallots bulb on day length, not days since planting. Every planting in this window bulbs together once summer days get long enough, so a long planting window still gives one tight harvest. Planting earlier just grows a bigger shallot before bulbing; it does not stagger the harvest.
The season, mapped

Seed to garden

The easy way to grow shallots is from sets, which are small bulbs you buy and plant. Each set splits into a clump of several bulbs. Push each set in pointy-end up so the tip just shows at the soil surface, and space them at their final distance because shallots are not thinned. Pick firm sets and avoid big or already-sprouting ones, which tend to flower instead of dividing. You can also grow shallots from seed, started indoors about 8 to 10 weeks early, which gives single bulbs rather than clumps.Sets are the classic and easiest route: each one divides into a clump of 6 to 12 bulbs. Push sets root-end down with the tip just at or above the surface, 1 to 2 inches deep, at final spacing, since shallots are not thinned. Choose firm, healthy sets; oversized or already-sprouted sets are primed to bolt rather than divide cleanly. Seed is the other path and gives single, uniform bulbs from modern hybrids, started about 8 to 10 weeks before set-out for the largest plants.

  1. 01
    Sow outside
    Oct - Nov or Jan - March
  2. 02
    First harvest
    Ready when day length triggers bulbing; see the day-length card above
Start method
Both
Soil temp
48-90°F
From seed to fruit

The growing journey

Stage 01 · Sprouting & Emergence
01
Sprouting & Emergence
Days 7-21 · current stage
If you planted sets, look for green shoots coming up within a week or two. If you planted seeds, look for thin grass-like shoots that start bent in a little loop, then stand up. Sets come up faster and more reliably than seed.From sets, a green shoot pushes up within a week or two as the bulb roots down; from seed, a single looped seed leaf emerges bent like a hairpin, then straightens into a slender tube. Stands from seed are sparse and uneven; sets are quicker and surer.
Keep the top of the soil damp so the sets root in well and any seeds do not dry out, and pull weeds early, because young shallots lose out to weeds easily. Space sets at their final distance, since you do not thin shallots.Keep the surface evenly moist so sets root in and seed never dries mid-germination, and keep the bed weed-free from the start; allium seedlings are weak competitors. Set sets at final spacing, since shallots are not thinned.
FROM PLANT · Push each set in pointy-end up so the tip just shows, about 1 to 2 inches deep, spaced 3 to 6 inches apart, since you do not thin shallots. Plant them shallow and do not pile soil over the bulbs, because the roots are shallow and that hurts them.Push sets in root-end down with the tip just at the surface, 1 to 2 inches deep, at final 3 to 6 inch spacing, since shallots are not thinned. Plant shallow; burying the bulb or hilling soil over it damages the shallow roots and shrinks the clump.
02
Leaf & Canopy Building
Days 21-90
Each plant grows a fan of upright leaves and starts to divide at the base into several shoots. This stage matters most for how full your clump gets, so you want steady, unbroken growth.Each set sends up a fan of upright tubular leaves and begins to split at the base into multiple growing points. This is the stage that decides clump size: the leaf canopy built now sets how many bulbs the clump can make and how large they get. You want vigorous, uninterrupted leaf growth, not a check from drought, weeds, or cold.
Help the plants grow lots of healthy leaves now. Feed with nitrogen, keep the soil evenly moist, and keep weeds out. Do most of the feeding early, because feeding too late leads to soft necks that do not store well.Push leaf growth: side-dress nitrogen, hold moisture steady, and stay ruthless about weeds. Front-load the feeding so the canopy is built before day length triggers bulbing; nitrogen applied late goes to soft necks instead of bulbs.
FROM PLANT · Focus on growing lots of healthy leaves now, because the leaves built early decide how full your clump gets. Feed with nitrogen about a month after planting and again a month later, keep the soil moist, and pull weeds, since shallots do not compete with weeds well.Push leaf growth now: the canopy each plant builds before day length flips it to bulbing sets how full the clump becomes. Side-dress nitrogen at about 30 and 60 days, keep moisture steady, and stay ruthless about weeds, which shallots compete with poorly.
03
Clump Division & Bulb Initiation
Days 70-110
When the days reach the right length, the plant stops making new leaves and each shoot swells into its own bulb, turning one planted set into a clump of several. This switch is set by how long the days are where you live, not by the calendar, so you cannot speed it up.Once day length crosses the cultivar threshold, the plant stops adding leaves and each growing point swells into its own bulb, so a single set becomes a cluster of 6 to 12. This is the photoperiod switch: the trigger is day length, set by your latitude and the season, not the calendar. The clump bulbs up on whatever leaf count it reached, which is why the leaf stage mattered.
You cannot make this happen faster, so just keep watering steadily as the clump starts to fill out. If nothing swells, or it swells when the plants are still tiny, you may have the wrong type for your area, which is the thing to fix next year.There is no action that moves this trigger; the work was done in the leaf stage. Keep moisture steady so the swell starts without a check, and confirm you planted a type suited to your latitude.
FROM PLANT · When the days reach the right length, the plant stops making leaves and each shoot swells into its own bulb. You cannot speed this up, so just keep watering steadily as the clump fills out. If nothing swells, or it swells while plants are tiny, you likely have the wrong type for your area, which is the thing to fix next year.Clump division is triggered by day length crossing the cultivar threshold, not by anything you do, so there is no action that moves it; the leaf count reached before the switch sets how many bulbs form and how large. Keep moisture steady so the swell starts without a check, and confirm you planted a type suited to your latitude.
04
Bulb Sizing
Days 95-125
The leaves stay green and standing while the bulbs in the clump get bigger below them and start to show at the soil surface. This is when shallots put on most of their size, so keep the watering steady.Tops stay green and upright while the bulbs in the clump swell and shoulders begin to show at the soil surface. This is the fast-fill window; steady, even moisture now translates directly into size, while any drought check costs final weight.
Keep watering evenly and stop adding nitrogen, because feeding now leads to thick necks that do not store. Do not bend the green tops down to hurry them, an old trick that actually makes shallots smaller, since those leaves are still feeding the bulbs.Hold even moisture through the swell and taper nitrogen off; late nitrogen now thickens necks and works against storage. Do not bend the tops to force them, an old trick that backfires because the standing leaves are still feeding the bulbs.
FROM PLANT · When the bulbs start to swell, stop adding nitrogen. Do not bend over the green tops to hurry things along, an old trick that backfires, because the leaves are still feeding the bulbs and breaking them makes the shallots smaller.As the clump swells, taper off nitrogen and let the necks mature; do not bend or break the green tops to force bulbing, since the leaves are still feeding the bulbs and knocking them down reduces final size.
05
Maturity & Curing
Days 110-140
The necks get soft and the green tops flop over by themselves. When most have fallen, it is time to harvest. After you lift the clumps, the bulbs still are not ready to store until they have dried: the skins turn papery and the necks dry shut.The necks soften and the tops fall over on their own; most tops down is the harvest cue. After lifting the whole clump, the bulbs are not storage-ready until cured: outer scales turn papery and the necks dry tight, which seals each bulb against rot.
On a dry day, loosen the soil and lift each clump, handling them carefully so they do not bruise. Then dry (cure) them for one to two weeks somewhere warm, shaded, and breezy until the skins go papery and the necks dry shut. Split the clumps into single bulbs and keep them cool and dry.Loosen and lift whole clumps on a dry day, handling gently to avoid the bruises that seed storage rot. Cure one to two weeks in a warm, airy, shaded spot until scales rustle and necks are tight, then break the clump into bulbs and store cool and dry.
FROM PLANT · Harvest when most of the tops have flopped over on their own and the necks feel soft. Lift the whole clumps gently on a dry day, and try not to bruise them, since bruises lead to rot in storage.Harvest when most tops have naturally fallen and necks have softened. Loosen and lift whole clumps on a dry day; careful handling avoids the bruises that seed storage rot.
FROM PLANT · Dry (cure) the shallots in a warm, airy, shaded place for one to two weeks until the skins are papery and the necks are tight. Then split the clumps into single bulbs and cut the tops about an inch above each. Shallots that are not dried well are the ones that rot in storage.Cure in a warm, airy, shaded spot for one to two weeks until outer scales are papery and the neck is tight and dry, then break the clump into bulbs and trim tops about an inch above each bulb. Poor curing is the main cause of storage loss.
Beginner
Know your soil

Your soil

Identify yours

Not sure what soil you have? Grab a small handful of damp soil from your garden bed and squeeze it. If it crumbles apart easily, it's sandy. If it holds together but breaks when you poke it, it's loam (what most vegetables want). If it stays in a hard, slippery ball, it's clay.

What this crop wants

Shallots like loose, rich, well-drained soil. Mix in compost before you plant. They do poorly in heavy clay or in soil that forms a hard surface crust, because their roots stay shallow and the multiplying clump needs air and steady moisture right near the surface.

If your soil doesn't match

You have sandy soil

Mix 2-3 inches of compost into the top 6 inches of your bed before planting. Compost holds moisture (which sandy soil drains too fast) and adds the nutrients sandy soil tends to lack. Repeat each season. Compost breaks down over time.

You have clay soil

Mix 2-3 inches of compost AND a few inches of coarse sand or perlite into the top 6 inches of your bed. The compost feeds the plants; the sand breaks up the clay so air and water can move through. Don't add sand without compost. It can compact like concrete.

Containers and raised beds

If amending your soil sounds like too much work, or if your soil is heavy clay, full of rocks, or contaminated, build over it. A raised bed at least 12 inches deep filled with a 50/50 mix of compost and sandy loam gives you ideal growing soil with no battles. A 5-gallon container with quality potting mix does the same for one plant at a time. Both bypass your native soil entirely.

Learn more about your soil
The specs

Care guide

The numbers that matter, at a glance.

Sunlight
Full sun · 6-10 hrs/day
Water
consistent
Spacing
3 to 6 inches
Soil
loam, sandy loam
Days to maturity
90-120 days from transplant
Soil pH
6 to 7
Container OK?
Yes · 5+ gal pot
Germination temp
48-90°F
In a pot

Yes, 5 gallons and up

Shallots grow well in pots because their roots stay shallow. Use a wide container at least 10 inches deep with drainage holes, and space the sets 6 inches apart. Pots dry out faster than garden beds, so check the soil often and do not let it stay dry, or the clumps will be small.Shallots are shallow-rooted and container-friendly. A wide, well-drained pot at least 10 inches deep, roughly 5 gallons or more, holds a few sets spaced 6 inches apart, each dividing into its own clump. Containers dry fast, so water before the surface crusts and feed a touch more often than in the ground; interrupted growth shrinks the clumps.

Pot size
5 gallons and up; 7 gallons is comfortable
Drainage
Drainage holes are a must. Skip the gravel layer. After you water, pour out any water that collects in the saucer under the pot. Shallots should never sit in standing water, because soggy soil around the clump leads to rot.Drainage holes are a must. Skip the gravel layer. Empty the saucer after each watering; shallots must never sit in standing water, which saturates the shallow clump zone and invites rot.
Watering
Water container shallots more often than garden ones. The soil in a pot dries out fast, and dry spells make the clumps small.Expect to water more frequently than in-ground; the shallow root zone in a pot dries quickly and any drought check reduces final clump size.
Depth and shape
At least 10 inches deep. wide_and_shallow_ok
Self-watering pot
Yes. Self-watering containers suit shallots well, smoothing out the steady moisture they need; keep the mix free-draining so the clump zone never stays saturated.
Mix
A free-draining potting mix blended with compost. Work in compost for fertility and a slow-release balanced feed at planting.
Feeding
Frequent watering leaches nutrients, so feed container shallots lightly but regularly through leaf growth, tapering as the clump bulbs up.
Winter

Where winters are mild, you can plant shallot sets in pots in fall and let them grow over winter for a spring harvest. Move or cover the pots during hard freezes, because roots in a container get colder than roots in the ground.In mild-winter zones, fall-set container shallots overwinter for a spring clump; protect pots from hard freezes since roots in a container chill faster than in open ground.

Pot safety

Ask what your balcony or roof can carry

A balcony or roof can only hold so much weight. Before you set heavy pots there, ask a building architect what it can safely carry.Illinois Extension's guidance is to consult a building architect about weight limits before placing heavy pots on a balcony or rooftop garden. It gives no weight figure.

Never grow food in a container with anything toxic in it

Many kinds of containers can be used. Whatever you choose, keep anything toxic out of it, especially if you are growing food.Colorado State accepts nearly any container material but warns against using a container that holds toxic materials, especially for edible plants. Illinois adds that a vegetable container should be free of chemicals toxic to plants or people, and urges caution with treated lumber when growing food. If you cannot account for what a repurposed container once held, that alone is a reason to keep food out of it.

Secure hanging containers well

Fasten hanging baskets and window or rail boxes securely. Think about what is below them too, since they can drip on people or things underneath.Illinois Extension asks growers to secure hanging containers well and to think through the safety issues of hanging them. Placement matters too, since a hanging container can drip onto people or belongings below.

Soil chemistry

Soil pH for shallot

Preferred
6 to 7
Tolerated
5.5 to 7.5

Shallots like soil close to neutral, about pH 6.0 to 7.0, and will tolerate roughly 5.5 to 7.5. They do not like sour (acidic) soil. A simple soil test takes the guesswork out, and garden lime helps if the test comes back too low.Shallots grow best near neutral, roughly pH 6.0 to 7.0, tolerating about 5.5 to 7.5. They dislike strongly acid soil; below about pH 6.0 a liming amendment helps. Confirm with a soil test before adjusting.

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Steady hand on the hose

Watering

When & how much
Frequency
Water shallots regularly so the soil stays evenly moist while they grow. Their roots are shallow, so dry spells make smaller clumps. Stop watering when the tops start to flop over, so the bulbs can begin to dry.Keep the soil consistently moist through leaf growth and bulb division; shallots have small, shallow root systems, and any drought check directly reduces clump size and bulb count. Then stop watering once the tops begin to fall, to start the bulbs curing.
Amount
About an inch of water a week is a good target, and more during hot, dry weather. Steady moisture is better than a flood one week and nothing the next.Aim for roughly an inch of water per week from rain plus irrigation, more in heat or sandy soil, keeping moisture near field capacity in the top 8 to 12 inches where the roots feed.
Method
Water the soil at the base of the plants, not over the leaves. Keeping the tops dry helps prevent disease.Water at the base with drip or a soaker to keep the foliage dry; wet tops invite the leaf and neck diseases that spoil bulbs in storage.
Signs of trouble
Too much water
If the soil stays soggy and the bottoms of the plants turn yellow and soft, that is too much water. Sitting in wet soil makes shallots rot.Waterlogged soil and yellowing, mushy bases signal overwatering; standing moisture around the clump encourages basal and neck rots.
Too little water
Wilting, bluish, or brown-tipped leaves mean the shallots are too dry. Shallots that do not get enough water stay small and taste sharper.Bluish, wilting, or tip-burned leaves and stalled growth indicate the clump is short of water; under-watered shallots stay small and turn more pungent.
Feeding rhythm

Feeding

Frequency
Side-dress twice early
Type
Nitrogen-forward
When to start
Side-dress during leaf growth, then taper off as the clump divides and bulbs form

Shallots are hungry plants. Feed them nitrogen while the leaves are growing, because strong leaves now mean a fuller clump of bulbs later. Feed about a month after planting and again a month after that, then stop feeding by about mid-July. Feeding late makes thick necks and soft shallots that do not keep well.Shallots are heavy feeders. Drive leaf growth early with nitrogen, side-dressing at about 30 and 60 days after planting, because the leaf canopy built before bulbing sets the size and number of bulbs in the clump. Then stop: hold off on nitrogen after about mid-July. Late, excess nitrogen delays maturity and produces thick necks and soft bulbs that store poorly.

High nitrogen early

Use a feed higher in the first number (nitrogen) early on, then stop the nitrogen once the bulbs start forming.Higher first-number (N) feeds early; ease off nitrogen as the clump starts to bulb.

Try ammonium sulfate or a balanced vegetable fertilizer
Who grows well together

Companion planting

Shallots are good neighbors for carrots, beets, lettuce, and cabbage-family plants, mostly because their strong allium smell is thought to keep some pests away. The main thing to avoid is planting them next to beans or peas, since alliums can slow those down. These are helpful traditions, not sure things, so do not worry if your garden does a little differently. Shallots earn their companion reputation mostly through allium scent, which is traditionally credited with deterring aphids and the carrot rust fly, so they pair well with carrots, beets, lettuce, and brassicas. The one firm caution is the legume conflict: alliums are widely held to inhibit beans and peas, so keep shallots away from them. Most of these claims are traditional rather than trial-proven; treat them as low-risk suggestions, not guarantees.

Other
Carrots
Shallots and carrots are a classic garden pair. The strong allium smell is said to help hide carrots from the carrot rust fly, and the two plants do not crowd each other's roots.Carrots and alliums are the textbook reciprocal pairing. Shallots' sulfur scent helps mask carrots from the carrot rust fly, and the two have complementary root habits. Intercropping trials have measured real reductions in carrot fly where alliums and carrots grow together. Plant in alternating rows with enough shallot density for the scent-masking to register; the strongest results come from small mixed plantings rather than large solid blocks. Research-backed
Beets
Beets and shallots grow well side by side. They like the same cool weather and stay out of each other's way.Beets and shallots share a bed comfortably. The allium pungency helps deter pests that bother beets, and because shallots bulb shallowly with sparse upright foliage while beets put their energy into a single root, the two do not crowd each other above or below ground. Mostly a good-neighbor, efficient-space pairing with a modest pest-repel bonus. Traditional
Lettuce
Fast little lettuce plants fit nicely in the gaps between shallots and like the same cool season, so you get two crops from one spot.Lettuce and shallots interplant efficiently. Lettuce is shallow-rooted and quick while shallots send narrow clumps down with little leafy spread, so they occupy different space and the lettuce fills in between rows. The allium scent offers a little aphid deterrence over the lettuce as a bonus. Treat it as a space-and-timing pairing first, mild pest help second. Traditional
Brassicas (cabbage, broccoli)
Cabbage and broccoli like the same cool weather as shallots, and the strong allium smell is thought to bother some of their pests.Shallots are a well-supported brassica companion through the allium family effect. Their sulfur scent helps mask the cabbage family and deter its signature pests, and extension trial work with alliums in a mix showed reduced caterpillar damage. Alliums are shallow and undemanding, so they tuck between brassicas without competing for the heavy feeding those crops want. Research-backed
Provenance tagged inline · see methodology for the labeling system Key
Harvest signals

When to pick

Your shallots are ready to dig when most of the leafy tops have flopped over and turned yellow and the necks feel soft, usually about 3 to 4 months after planting sets in spring. Dig up the whole clump on a dry day, then dry (cure) the bulbs before storing. If you want fresh green shallots sooner, you can pull a few young plants at around 50 to 60 days and use them like green onions.A shallot clump is ready when most of the tops have yellowed and fallen over on their own and the necks have started to soften and dry, usually 90 to 120 days from a spring set. Lift the whole cluster on a dry day, brush off loose soil, and cure before storing. You can also pull green shallots early, at 50 to 60 days, for fresh use like scallions.

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Yield

What to expect

Each set you plant gives you a clump of about 6 to 12 shallots. Spacing them wider makes bigger clumps; planting close makes fewer, larger single bulbs. A 10-foot row gives several pounds in a good year.One set yields a clump of about 6 to 12 bulbs; wider spacing makes larger clumps, denser spacing makes fewer, bigger single bulbs. A 10-foot row at 6-inch spacing returns roughly several pounds of cured shallots in a good season.

Shallots of the same kind all finish around the same time, so you harvest most of them together rather than a few at a time.All clumps of a variety size up and mature together as day length triggers bulbing, so the harvest comes in one main flush rather than over a long window. The biggest things for a good first harvest are picking a type suited to where you live and giving each set room to make a full clump. Crowding gives lots of tiny bulbs.Matching variety type to your latitude and giving each clump room are the biggest first-year yield levers; crowded clumps make many tiny bulbs, and a mismatched type bulbs too early or barely divides.

What changes yield
variety type matched to latitudespacing for clump roomleaf count at bulb initiationconsistent moistureearly nitrogen then taperfreedom from bolting
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Off the vine

Storing your harvest

Room temp
Once the shallots are cured (dried), split the clumps into single bulbs and keep them somewhere cool, dry, and airy. They keep best just above freezing; a warm spot makes them sprout. Good storage kinds last many months.After curing, store cured clumps, broken into individual bulbs, in a cool, dry, well-ventilated spot near 32 to 40°F; warmer than about 40°F encourages sprouting. Good storage types hold for many months, often longer than onions.
Fridge
You do not need to refrigerate whole cured shallots, and the fridge can make them damp. Fresh green shallots are the exception and keep a week or two in the fridge.Whole cured shallots do not need refrigeration and can sweat in the crisper. Fresh green shallots are the exception, keeping a week or two chilled.
Freezer
You can chop shallots and freeze them for cooking. They go soft after thawing, so use frozen shallots in cooked food, not in salads.Shallots freeze well chopped for cooking; texture softens, so use frozen shallot in cooked dishes rather than raw.
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When something goes wrong

Common problems

01 of 03
02 of 03
03 of 03
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The usual suspects

Pests & diseases

Pests
Onion thrips
P · 01
Cause A tiny insect called onion thrips. It multiplies fast in warm, dry weather and hides in the tight folds of the leaves.Onion thrips (Thrips tabaci) build through warm, dry spells, sheltering in the leaf axils where sprays miss them.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Garden sanitation

    When the shallots come out, do not leave the bed to itself. Pull every onion-family plant still standing, volunteers included (the stray onions that sprout from bulbs missed at harvest), and rake up the dead tops and trimmings. Thrips spend the winter in exactly that kind of leftover onion-family material lying on the soil, so a bed cleared in fall has far less to hand the next crop in spring. Carry the debris away instead of stacking it at the edge of the bed.Thrips tabaci overwinters in allium material left on the soil surface and in volunteer alliums, so the season-end cleanup sets the size of the population that starts building through the first warm, dry spell of the next season. Rogue out volunteers, clear the tops and trimmings, and move the material off the bed rather than leaving it at the margin. The other carryover source sits outside the bed, in grain, alfalfa or clover stands, and is handled by siting rather than by sanitation.

  2. Balanced nitrogen feeding

    Feed shallots enough nitrogen, the nutrient that drives leafy growth, to grow well, and no more. Heavy feeding makes thrips worse, so skip any extra dose meant to push bigger tops. Keep the plants watered as well as fed, because a strong plant shrugs off the feeding better; that is tolerance, though, not fewer insects, so it goes alongside the other steps here rather than in place of them.Hold nitrogen at adequate rather than heavy. Excess nitrogen promotes onion thrips, and the population it builds shelters in the leaf axils where sprays miss it. Pair the restraint with steady water: vigor buys tolerance of the rasping rather than a lower count, so a well-grown clump loses less size to the same number of thrips but does nothing to thin them.

  3. Water spray

    Catch this early. While the silvery streaks are still few, knock the thrips loose with a hard spray from the hose, pointing the nozzle down into the crease where each leaf meets the next, since that is where they sit and a spray across the top of the clump misses most of them. Do it in the morning so the leaves are dry by evening. If the streaking keeps spreading anyway, your local extension office can tell you what is worth using.A hard jet of water aimed down into the leaf folds knocks a light infestation back; Thrips tabaci shelters in the axils, so a stream that only sweeps the outside of the clump leaves most of the population where it sits. It is a knock-back for low numbers, not an answer to an outbreak. Work in the morning so the foliage dries quickly, and hand a persistent outbreak to your local extension office rather than escalating on your own.

  4. Beneficial predators

    Minute pirate bugs and lacewings eat thrips, and they will do part of the job for you if you let them. The way to keep them is to stay away from broad-spectrum insecticides, the sprays that kill most insects they touch, because those take out the helpers along with the thrips. Watch for the silvery streaks through warm, dry weather, when thrips multiply fastest, and let the predators work before reaching for anything stronger.Minute pirate bugs and lacewings help against onion thrips where broad-spectrum sprays are avoided, which makes this less a step you take than one you protect. A broad-spectrum material kills the predators along with whatever thrips it reaches, and it does not reach the ones sheltered in the leaf axils. Keep the bed unsprayed while the count is light and the predators are present, and go to extension advice only for a persistent outbreak.

No spray for this one. Prevention is the control.

Onion maggot
P · 02
Cause The larvae (maggots) of a small fly that lays its eggs at the base of onion-family plants. It spends the winter in the soil where onions or shallots grew the year before, and old bulbs and rotting garden waste draw it in.Larvae of the onion maggot fly (Delia antiqua), which lays at the base of the plant; the pupae overwinter in the soil around last season's shallots or onions, and cull piles and volunteer onions keep the fly going between crops. Rotting organic matter and spring manure draw egg-laying, and cool, wet springs favor the maggots.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Crop rotation

    Give shallots a bed that had no onions, garlic, leeks or shallots in it last year, and put the new bed well away from the old one. The fly spends the winter as pupae, its resting stage, in the soil where last year's onion-family crop grew, so planting into that same soil, or right next to it, sets the crop down where the flies come up in spring. Cool, wet springs are when getting this wrong costs the most.Delia antiqua pupates in the soil around last season's shallots and onions, so a bed that carried alliums last year has the spring flight built into it. Rotate off that ground and site the new planting at a distance from it, not just beside it, since the flies emerge from the old bed regardless of what is growing there now. Cull piles and volunteer alliums keep the fly going between crops, so the rotation is only as good as the sanitation around it.

  2. Garden sanitation

    Clear away anything the fly can breed in. That means the small or damaged bulbs you set aside (culls), any onion-family plants that sprout on their own, and the rotting leftovers of last year's crop. Keep fresh manure out of the bed in spring, and do not turn a green cover crop under just before planting either; rotting organic matter is what draws the fly to lay its eggs there. Put culls in the trash, not on a pile beside the bed.Culls, cull piles and volunteer alliums carry Delia antiqua between crops, and rotting organic matter draws its egg-laying, so sanitation works on both ends of the cycle. Remove culls and volunteers from the bed and its surroundings, and keep spring manure and green manure out of the ground shallots are going into, since a bed rich in fresh, decomposing material attracts the females to lay. The manure part is settled before planting; the cull and volunteer part runs all season.

  3. Timing the planting

    Where your season is long enough, wait to plant until the first wave of flies has come and gone in spring, so the young plants are not standing there while eggs are being laid. Ask your extension office when that first flight usually ends where you live, because it shifts with the region and the year, and treat a published date as a starting point rather than a promise. This only works if a later start still leaves enough season to grow a bulb.Where the season allows, planting after the first flight has passed reduces damage, since the spring generation lays at the base of plants that are already up. This moves the crop in time where rotation moves it in space, and it pays only where the delayed start still leaves room to bulb. Emergence dates shift with region and year, so a published window is a starting point to confirm locally, not a date to carry across regions.

  4. Floating row cover

    Floating row cover is a thin, light fabric that sunlight and rain pass through and insects cannot. Spread it over the bed the day you plant, before the spring flies are out, and weigh the edges down all the way around, because the fly lays at the base of the plant and slips through any gap along the edge. One warning: a bed that grew onions or shallots last year must not be covered, because the flies coming up out of that soil would be sealed in with the crop.The row cover goes on at planting and stays sealed until the spring flight is over; Delia antiqua lays at the base of the plant, so the fabric has to be down before the first females are out, not after wilting shows. Use it on rotated ground only. The pupae overwinter in the soil of last year's allium bed, and fabric laid over a bed that carried alliums last year seals those flies in with the crop as they emerge.

No spray for this one. Prevention is the control.

Allium leafminer
P · 03
Cause A small invasive fly that attacks onions, shallots, garlic, and leeks. The adults come out and lay eggs in spring and again in fall, and the grubs tunnel into the plants.The allium leafminer (Phytomyza gymnostoma), an invasive fly that attacks alliums including shallot; adults fly and lay eggs in a spring generation (about March into May) and again in fall (September into October).
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Crop rotation

    Move your onion-family plantings to fresh ground each year instead of putting shallots back where alliums grew. The grubs bore down out of the leaves into the bulb and pass the winter there as pupae, the resting stage, so an old allium bed is where the next spring's flies come from. Rotating does not replace covering the plants; it means you are not planting right on top of the problem.Rotate away from alliums. Phytomyza gymnostoma pupates in the bulb it mined, so ground that carried an infested crop holds the pupae that produce the spring flight, and a planting set back into it meets the adults as they emerge. Rotation sits beside the covers rather than in place of them: it reduces what the bed itself contributes, while the cover handles the adults in flight.

  2. Floating row cover

    Cover the plants with row-cover fabric or fine insect netting before the flies show up, once in spring and again in fall, and seal the edges down so none can get in. Put on in time, the cover comes close to full control of this pest; put on after the rows of white dots appear, it is late. Do not put a cover over a bed that grew alliums last year, or you seal the flies coming out of the old bulbs in with the crop.Row cover or insect netting installed before each flight and sealed at the edges comes close to full control. Phytomyza gymnostoma has two adult flights, roughly March into May and again September into October, and the cover has to be down ahead of each, since the eggs go into the leaf and the larvae are inside the tissue from then on. Its pupae overwinter in the bulb, so cover rotated ground only; fabric over a bed that carried alliums last year seals the spring emergence in with the crop.

  3. Spinosad

    If you cannot cover the plants, a spinosad spray is the fallback. Spinosad is an organically acceptable insecticide used against leafminers, thrips and caterpillars, and it stands in for the cover rather than adding to it. It is toxic to bees while wet and for about a day after, so keep it off anything in flower and spray at dusk when bees have gone in. Use it in spring or fall once the grubs are in the leaves, rather than on a calendar date.Spinosad is the option where covers are not practical; under a cover that went on in time it adds little. It penetrates the leaf to reach the larvae mining inside it, so time it to the larvae rather than the calendar in either generation: the rows of white dots along a leaf edge are the egg-laying scars, and the larvae behind them are what the spray meets. It is toxic to bees when sprayed and for roughly a day afterward: apply at dusk and keep it off flowering plants.

The bottom rungs are products with label rules: timing, pollinators, and days to wait before harvest. Before you spray →

Diseases
White rot
D · 01
Cause A soil fungus that attacks only onions, shallots, garlic, and leeks. It likes cool, damp soil, and its survival specks last in the ground for decades, so an infected bed stays a problem for years.A soilborne fungus (Sclerotium cepivorum) that attacks only alliums and favors cool, moist soil. Its sclerotia survive in the ground for over 20 years, so once a bed is infested it stays infested.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Clean planting stock

    Buy shallot sets from a source you trust and look them over before planting. This fungus travels on infested sets and on soil that comes along with them, and there is no cure once it shows up, so keeping it out of your garden is where the effort goes.Infested sets, and the soil that moves with them, are how Sclerotium cepivorum reaches clean ground, so screening what you plant acts before the pathogen has anywhere to persist. There is no rescue once it appears and no treatment that reverses an infection, which is what puts the purchase decision ahead of everything else on this disease.

  2. Garden sanitation

    If a clump does go down with it, dig it out along with the soil that comes up on the roots and put it in the trash rather than the compost pile. Those tiny black specks at the rotted base are survival bodies, and composting spreads them through the garden.Rogue affected clumps and dispose of them away from the garden rather than composting them. The sclerotia, the poppyseed-sized black resting bodies on the rotted base, are what persist, so tissue routed through a compost heap returns them to ground you use. Handle soil moved off that bed the same way.

  3. Crop rotation

    Keep shallots and other alliums out of that bed for as many years as you can manage. The survival specks last decades in the ground, so a season or two away does not clear it and the bed stays a problem for a long stretch.Rotate alliums out of an infested bed for as long as is practical. Sclerotia survive in the ground for over 20 years, so the organism sets the length of the break rather than any normal rotation interval, and infested ground is best treated as carrying the disease indefinitely. Sclerotium cepivorum attacks only alliums, so any other crop can use the bed in the meantime.

No spray for this one. Prevention is the control.

Downy mildew
D · 02
Cause A mildew that spreads in cool, wet, humid weather, especially when the leaves stay wet and the plants are crowded.The fungus-like pathogen Peronospora destructor, favored by cool, wet, humid conditions and lingering leaf wetness; it spreads fast in crowded, poorly aired plantings.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Airflow and spacing

    Set the plants far enough apart at planting that air can move between them. This mildew races through a crowded bed where the leaves stay damp, and the fuzzy gray-purple coating shows up on mornings when the air is still and humid. Room between plants lets a breeze in and lets the leaves dry, and it is the one thing you cannot add once the sets are in.Peronospora destructor spreads fastest in crowded, poorly aired plantings, and it sporulates on the leaf in humid mornings when the foliage has stayed wet, so spacing is set at planting for one effect: a canopy that airs out and dries sooner after dew, which takes away the lingering wetness the pathogen needs to infect and sporulate. There is no resistant shallot to lean on, which leaves layout decisions like this one carrying the defense together with watering and rotation.

  2. Water at the base

    Water the soil, not the leaves. This mildew needs leaves that stay wet, and a sprinkler or a hose played over the tops gives it exactly that. Run the water along the ground at the base of the plants and keep the foliage dry. Cool, wet, humid weather already suits the mildew; overhead watering adds to it on the days the weather does not.Irrigate at the base to keep the foliage dry. Lingering leaf wetness is the condition Peronospora destructor infects and sporulates under, and overhead watering supplies it on demand in weather that would otherwise have dried the canopy. Dew and cool, humid mornings stay outside your control, which is why this pairs with spacing: one shortens how long the leaves stay wet, the other limits how often you make them wet.

  3. Crop rotation

    Where downy mildew has shown up, do not grow shallots or their onion-family relatives in that bed again for at least three years. The disease carries over in sick leaves left behind, in piles of reject bulbs, and in the volunteer plants that sprout from them, so a bed that had it last year is the likeliest place to get it again. Choose the new bed before planting; it cannot be changed later.Rotate away from alliums for three years or longer where the disease has occurred. Peronospora destructor persists between seasons in infected debris, cull piles and volunteer alliums, so the length of the break matters as much as the fact of it; one year off returns the crop before the carryover has died out. With no resistant variety available, the rotation and the cleanup are what stand between an infested bed and the next planting.

  4. Garden sanitation

    Pick off leaves that have gone pale and fuzzy and get them out of the bed, and get rid of them rather than leaving them lying there or burying them. At the end of the season clear the leftover tops, any pile of reject bulbs, and every onion-family plant that came up on its own nearby, because volunteers carry the disease over from one year to the next.Destroy infected debris, cull piles and volunteer alliums, since all three carry Peronospora destructor across seasons and volunteers do it in a living host that no rotation touches. In season, removing affected leaves as they yellow and collapse takes sporulating tissue out of the canopy; at season's end the cleanup is what makes the rotation mean anything, because a volunteer left standing beside the new bed resets the clock.

  5. Balanced nitrogen feeding

    Go easy on nitrogen, the fertilizer that drives leafy growth. A heavy dose gives shallots a mass of soft, sappy leaves, and that is the kind of growth this mildew does best on. Feed enough for the plants to grow normally and stop there, and skip any extra feeding meant to push bigger tops.Hold nitrogen back to what the crop needs. An overproduction of succulent leaves promotes Peronospora destructor, and a dense, soft canopy holds the leaf wetness the pathogen depends on, so heavy feeding works against the spacing and the basal watering at the same time. With no resistant variety, fertility restraint is one of the few levers still in hand once the layout is fixed.

No spray for this one. Prevention is the control.

Botrytis neck rot
D · 03
Cause A mold that gets into the neck of shallots that were harvested too green or not dried properly. Too much late fertilizer and bending the tops down make it worse.Botrytis infection of immature or insufficiently cured necks; excess late nitrogen and bent-over green tops worsen it.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Balanced nitrogen feeding

    Ease off fertilizer as the season goes on. Nitrogen, the nutrient that pushes leafy growth, keeps the tops soft and green late into the year, and shallots pushed late end up with necks that stay green and do not tighten, which is where this mold gets in. Feed early, then let the plants finish and dry down on their own.Cut late nitrogen. Excess feeding late in the season keeps the neck immature at harvest, and Botrytis infection of immature or insufficiently cured necks is what this disease is; the fertilizer decision is made weeks before the curing one and shapes how well the curing can go. Feed for bulb growth early, then let the tops mature and fall on their own instead of pushing them.

  2. Cure and store the harvest

    Let the tops go over on their own instead of knocking them down to hurry bulbing, then dry (cure) the shallots until the necks are tight before putting them somewhere cool and dry. Bulbs lifted while still green, or dried too little, are the ones that go soft at the neck weeks later.Let the tops mature and fall naturally, do not knock green tops down to force bulbing, and cure until the necks are tight before storing cool and dry. Botrytis enters through necks that were immature at harvest or insufficiently cured, so the cure is the control and the bent-over green top is the shortcut that defeats it. Storage conditions protect a sound, well-cured bulb; they do not rescue one whose neck was soft going in.

No spray for this one. Prevention is the control.

Pink root
D · 04
Cause A soil fungus that builds up when shallots and their relatives are grown in the same ground year after year. Stressed plants get it worst.A soilborne fungus (Setophoma terrestris, long known as Phoma terrestris) that penetrates the roots directly without a wound and builds up with every onion-family crop on the same ground; it is most active at soil temperatures of 75 to 85°F, and weak or stressed plants in heavy, wet soil are the most susceptible. Shallots are a form of the same species as onion and get it the same way.
The control ladder

The ladder troubleshoots from the gentlest solution to the strongest. Start with the gentlest option and only move on when and if it doesn't work.

  1. Crop rotation

    Plant shallots in a bed that has not grown onions, garlic, leeks or shallots for three to six years, and count the years honestly. This fungus builds up a little more with every onion-family crop on the same ground, and it hangs on in the soil for years, so rotating brings it down without wiping it out; a bed that had bad pink root is still a bed to be careful with after the break.Rotate off allium ground for three to six years, and treat the rotation as reducing Setophoma terrestris rather than clearing it, since the fungus persists in soil for years and builds with every allium crop on the same ground. It penetrates roots directly, without a wound, and is most active at soil temperatures of 75 to 85°F, so a warm bed with a long allium history is where the stunting reads worst. The rotation lowers what the next crop meets; it does not zero it.

  2. Improve drainage

    If water stands in the bed after rain or the soil is heavy and stays wet for days, improve the drainage before planting shallots there, or give them a different bed that drains. Weak, stressed plants in heavy, wet ground are the ones this fungus takes hardest, and stunted plants with pink, shriveled roots are the result. Getting water away from the roots is one fix still open on ground that carries the fungus; keeping the plants watered and fed so the roots stay strong is the other.Improve drainage on heavy ground before planting. Setophoma terrestris takes weak or stressed plants in heavy, wet soil most readily, and once the fungus is in the ground a rotation only reduces it, so the drainage of the bed is the condition you can still change on infested soil. Pair it with keeping the crop vigorous through the season, since weak roots are the ones it takes; the fungus needs no wound to enter, and a stressed root gives it the least resistance.

No spray for this one. Prevention is the control.

Verified · 7 sources View
Seasoned
Where to plant next year

Crop rotation

Shallots do well planted after leafy greens or beans and peas. Just do not plant beans or peas right next to shallots, since alliums can slow them down.Shallots follow well after a leafy or legume crop and pair poorly before beans and peas, which alliums tend to inhibit.

Family
Allium
Years between
4 years
in the same bed
Avoid following
Do not plant shallots where you grew shallots, onions, garlic, or leeks recently. Some allium diseases live in the soil and build up, and white rot in particular lingers for years. Wait at least 3 to 4 years before growing alliums in the same spot again.Avoid following shallots or other alliums (onions, garlic, leeks) in the same ground; several allium diseases, including white rot and pink root, persist in soil for years. White rot sclerotia can survive decades, so commercial guidance runs 5 to 7 years between allium crops; a home garden can target at least 3 to 4.
Plant after
leafy greens or legumes
Verified · 2 sources View
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The plant app sends a timely reminder at every critical moment of your shallot season. The wording adjusts to whichever you pick: beginner or seasoned. Here are three you'll see in Zone 9.

p
plant
2 weeks before last frost
Time to plant shallot sets Plant shallot sets
Plant your shallot sets now, once the soil can be worked in spring (or in fall where winters are mild). Push each one in pointy-end up so the tip just shows, spaced 3 to 6 inches apart. Use firm, not-too-big sets so they do not bolt. Push sets into workable soil as soon as it can be worked in spring, or in fall in mild-winter zones. Set them tip-up with the point just at the surface, at final 3 to 6 inch spacing, since shallots are not thinned. Firm, modestly sized sets resist bolting.
p
plant
4 weeks after plant out
Feed your shallots now Side-dress shallots with nitrogen
Feed your shallots a nitrogen fertilizer now and again about a month later to grow plenty of leaves before the bulbs form. Stop feeding by about mid-July. More leaves now means a fuller clump later. Side-dress nitrogen now and again about a month later to drive leaf growth before bulbing; stop feeding by about mid-July. The canopy built now sets how full the clump becomes.
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Methodology & sources

Every date, temperature, spacing, and recommendation on this page is sourced from university cooperative extension publications, peer-reviewed agricultural research, NOAA climate data, and direct extension calendars. Where claims are softer (traditional gardening wisdom not formally documented), we say so.

Research-backed Documented in cooperative extension publications or peer-reviewed research
Well-grounded A known agronomic principle, but not formally tested for this specific pair
Traditional Time-tested gardening wisdom, limited formal research support
Last reviewed
June 29, 2026
Data version
crops_data_final · v1.0 · schema 2.9
Sources cited on this page
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Verified entries
Companion-planting claims tagged inline · zone dates verified against 5+ extensions
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  • University of Minnesota Extension umn_ext
  • University of Maryland Extension umd_ext
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  • Iowa State University Extension iastate_ext
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  • UC Davis Postharvest Center ucd_postharvest
  • Texas A&M AgriLife Extension tamu_agrilife
  • Virginia Cooperative Extension 426-331 vce_426_331
  • Piedmont Master Gardeners piedmont_mg
  • UGA Vegetable Garden Calendar uga_calendar
  • Clemson Home & Garden Information Center clemson_hgic
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  • NOAA 1991-2020 Climate Normals noaa_normals

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