What happened Ripe or nearly ripe fruit cracked open, sometimes showing the seeds. This is the number-one pomegranate problem, and it is about water, not disease: the skin splits when the seeds soak up water faster than the skin can stretch, which happens when the watering swings from dry to wet, after a big watering or the first fall rains following a dry stretch. It is easy to blame the variety, but the fix is how you water and when you pick: keep the soil evenly moist from the time fruit forms until harvest, and pick before big rains instead of leaving fruit out.Ripening or ripe fruit cracked, often exposing the arils. This is the signature pomegranate failure, and it is a water problem, not a disease: the rind splits when the arils take up water faster than the skin can stretch, which happens when moisture swings from dry to wet, after a heavy irrigation or the first fall rains following a dry spell. It is tempting to blame the variety, but the fix is watering and timing: keep soil moisture EVEN from fruit set through harvest, and pick ahead of significant rain rather than leaving fruit on the plant. Next season Water evenly all summer while the fruit fills (deep, regular soaks, no going dry and then soaking), mulch to steady the soil, and pick at full color before the fall rains come.Keep soil moisture even all through fruit development (deep, regular watering, no dry-then-flood swings), mulch to buffer the soil, and harvest at full color ahead of the fall rains.
What happened The plant flowered but barely fruited. On pomegranate the usual reasons are a young plant (it takes 2 to 3 years to start fruiting and 5 to 6 for full crops), damp or cool, still weather during bloom that makes the flowers drop, or too much nitrogen growing leaves and shoots instead of flowers. People often think it needs a partner plant, but pomegranate makes fruit on its own. The real fixes are patience, an open, sunny, breezy spot, and going easy on fertilizer.The plant bloomed but few or no fruit formed. On pomegranate the usual causes are a young plant (it takes 2 to 3 years to begin bearing and 5 to 6 for full crops), humid or cool, still weather at bloom that causes flowers to abort, or excess nitrogen driving leaves and suckers over flowers. People often assume it needs a pollinator partner, but pomegranate is self-fruitful and a lone plant should set. The real levers are patience, an open sunny breezy site, and restrained feeding. Next season Give a young plant a few years, plant it in an open, sunny, breezy spot so the bloom-time air is not damp and still, and go easy on nitrogen so it makes fruit instead of leaves.Give a young plant time, site it in open, sunny, breezy ground so bloom-time air is not humid and still, and keep nitrogen feeding light so the plant favors fruit over leafy growth.
What happened A fruit that looked almost fine on the outside was brown and moldy inside when you cut it. This is Alternaria heart rot, or black heart: a fungus gets in through the flower in damp bloom weather, or through insect holes (especially from the leaf-footed bug), and rots the inside with little sign outside. There is no cure once it is inside. It is much less of a problem in hot, dry weather, so the fixes are climate, pest control, and cleanup, not a spray.A fruit that looked nearly normal outside was brown and moldy inside when cut. This is Alternaria heart rot (black heart): the fungus infects through the flower in wet or humid bloom weather, or enters through insect punctures (notably leaf-footed bug), and rots the interior with little or no external sign. There is no cure once it is inside. It is far less of a problem in hot, dry climates, so the controls are climate, pest management, and sanitation, not a spray. Next season Grow it in a hot, dry, open, airy spot if you can, control the leaf-footed bug and other fruit-piercing pests, water at the ground instead of over the top, and clean up any rotted or old dried fruit so it does not spread.Favor hot, dry-summer siting and open, airy canopies, control leaf-footed bug and other fruit-piercing pests, water at the ground rather than overhead, and remove infected and mummified fruit so spores do not carry over.
What happened The fruit ripened but was pale, bland or sour, or small. The most common reason is not enough summer heat: pomegranate needs a long, hot summer to build color and sweetness, so cool coastal or short-summer spots give lower-quality fruit even on a healthy plant. Watering too much late, letting a young plant carry too much fruit, or picking too early (it does not ripen after picking) also hurt quality. The fix is matching the climate, choosing the right variety, and picking at full color.The fruit ripened but was poorly colored, bland or sour, or undersized. The most common cause is not enough summer heat: pomegranate needs a long, hot season (roughly temperatures above 85°F for 120-plus days) to build color and sugar, so cool coastal or short-summer sites give lower-quality fruit even on a healthy plant. Over-watering late, under-thinning on a young plant, or picking underripe (pomegranate does not ripen off the plant) also dull quality. The fix is climate fit, variety choice, and picking at full color. Next season In cooler or shorter-summer areas, pick an early, sweeter variety (Granada, Eversweet, Angel Red), give it the hottest, sunniest spot you have, keep the water steady, and only pick when it is at full color.In cooler or shorter-summer areas, choose an early, sweeter variety (Granada, Eversweet, Angel Red), give it the hottest, sunniest spot you have, keep water even, and pick only at full color.