Zone 3 · Herbs Growing Guide

When to Plant Dill
in Zone 3

Fast, feathery, and self-seeding. Plant once and you'll have it forever — it reseeds prolifically. Harvest young leaves for flavour; let some plants set seed for pickling.

Plant window opens
May 01
Last chance to plant
Jul 01
Last frost
~May 15
Days to harvest
40–60 days
Difficulty
Easy
Wrong season — Zone 3
Harvest: Jun – Sep

Planting Calendar

In Zone 3, Dill can be planted outdoors from May 01 — the window closes around Jul 01.

Direct sow as soon as last frost passes. Dill dislikes transplanting.

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What Zone 3 growers say about Dill
plant team · Zone 3
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Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Moderate
Spacing
9–12 inches
Soil
Well-draining, slightly sandy
Days to maturity
40–60 days
Soil pH
5.8–6.5
Plant tip · Zone 3
Direct sow as soon as last frost passes. Dill dislikes transplanting.
How to know it's ready
Pick feathery leaves any time. For seeds, wait until seed heads turn brown.

Watering Dill

How often
Weekly once established
How much
1 inch per week
Method
At soil level
Overwatering signs
Yellowing
Underwatering signs
Wilting, poor seed set

Feeding Schedule

How often
once at planting
Feed type
Balanced fertilizer (light)
Key timing
at planting
NPK: 10-10-10 at half strength

Light feeder. A single balanced feed at planting is sufficient. Over-feeding reduces aromatic oils.

Example product: Half-strength fish emulsion
Reminder: every 21 days after feeding

Succession Planting

Sow every 3 weeks

Sow every 3 weeks from spring through midsummer. Dill bolts in heat but more slowly than cilantro — you get 4–6 weeks of good leaf production before flowering. Succession keeps a supply of fresh feathery fronds through the season. Note that dill at different stages serves different purposes: young plants for fronds, mature plants for flower heads (great with cucumbers), seeds for pickling. Plan your succession with the end use in mind.

Direct
Direct sow — taproots dislike disturbance. Succession sow every 3 weeks.
Container friendly · Minimum 2 gallons
Works in deep pots (taproot). 8–12 inches deep minimum. Can grow tall — stake if needed.

Companion Planting for Dill

What you plant near dill makes a real difference — here's what to plant, when, and why.

Pest deterrent
Cucumbers
Attracts beneficial insects when flowering
Plant at same time
Brassicas
Attracts predatory wasps
Plant at same time
Keep away from
Carrots — Cross-pollinates, weakens carrot seed
Tomatoes — Mature dill inhibits tomatoes

Pests & Diseases

Know what to look for before it gets out of hand — early identification is the most important step.

What to look for
Clusters of tiny soft insects on new growth and leaf undersides. Leaves curl, yellow, or become sticky with honeydew. Sooty black mold may follow.
Cause
Multiple aphid species. Populations explode rapidly in warm weather.
Organic treatment
Blast off with strong water jet. Apply insecticidal soap or neem oil directly to colonies. Introduce ladybugs or lacewings.
Prevention
Plant marigolds and nasturtiums nearby. Avoid excess nitrogen fertilizer which creates soft, aphid-attractive growth. Encourage beneficial insects.
What to look for
Root damage and wilting. Cilantro and dill are in carrot family and attract same pests.
Cause
Psila rosae. Affects all members of the carrot family.
Organic treatment
Grow under fine insect mesh.
Prevention
Insect mesh. Grow away from carrots and parsnips.
What to look for
Dark brown spots on leaves. Affected leaves yellow and die.
Cause
Bacterial or fungal leaf spot. Favoured by wet conditions.
Organic treatment
Remove affected leaves. Copper-based fungicide.
Prevention
Water at soil level. Good spacing.

Recommended Varieties

  • Fernleaf (compact, slow bolt)
  • Bouquet (prolific, classic)
  • Dukat (high oil content, very flavourful)
  • Mammoth (tall, good for pickling)
Fernleaf is the best container dill — compact and slower to bolt than standard varieties.
Crop Rotation — rotate every 2 years
Carrot family (Apiaceae)
Avoid planting after: Carrots, parsnips, cilantro, parsley — share carrot fly
Good to follow: Legumes, brassicas
Dill is in the carrot family. Avoid near or after carrots.

Storing Your Harvest

Room temp
3–5 days in water
Fridge
1 week in water
Freezer
Freeze fronds dry on a tray, then bag — very good. Or freeze in oil cubes.
Dried dill loses flavour quickly. Freezing is better for preserving the green, fresh taste.

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Know exactly when to plant, prune, and harvest Dill

plant uses your ZIP code and real frost data to tell you the right day — not just the right month. Get notified when your planting window opens, when to succession sow, and when to cut back for next season.

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Common questions

In Zone 3, direct sow dill outdoors May 1 – Jul 1 after your last frost of approximately May 15. Direct sow as soon as last frost passes. Dill dislikes transplanting.
Zone 3 has an average last spring frost around May 15 and a first fall frost around Sep 15. These vary by location — the plant app uses your ZIP code with NOAA data for precision.
Good companions for dill include Cucumbers, Brassicas. Avoid planting near Carrots, Tomatoes.
Dill typically takes 40–60 days to harvest in Zone 3. Expected harvest window: Jun – Sep.

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