Eggplant flowers falling off without setting fruit

What you’re seeing

Flowers open and appear normal but wither and drop within a few days without any fruit forming behind them, sometimes with the whole plant otherwise looking healthy and vigorous.

Could it be something else?

Likely causes

Ranked most common first.

1. Temperatures outside eggplant's fairly narrow comfort range. Eggplant sets fruit best with daytime temperatures around 70-85°F and nights above about 60°F - both a cold snap and a heat wave above the mid-90s°F can cause blossom drop, and eggplant is somewhat less heat-tolerant for fruit set than tomatoes.
2. Low humidity or very still air. Eggplant flowers rely on some airflow or insect activity to move pollen within the flower; very still, dry conditions can reduce successful pollination.
3. Water stress. Both drought stress and waterlogging around the root zone can trigger blossom drop, since either disrupts the plant's ability to support developing fruit.
4. Heavy nitrogen fertilizer. As with tomatoes and peppers, excess nitrogen pushes leafy growth at the expense of flowering and fruit set.

How to fix it

1. Wait out a temperature extreme - fruit set typically resumes within a week or two once conditions moderate back into eggplant's comfort range.
2. Gently shake or tap flowering branches every day or two to help pollen move within the flowers during still weather.
3. Keep soil evenly moist, since eggplant is notably sensitive to both drought and waterlogging during flowering.
4. Ease off nitrogen fertilizer once the plant is flowering, shifting toward a lower-nitrogen, bloom-supporting feed if continuing to fertilize at all.
5. Provide light afternoon shade during a heat wave in hot climates.

Common mistakes

• Feeding heavily with nitrogen once the plant is flowering, which pushes leaves rather than fruit.
• Watering irregularly. Eggplant is sensitive to both drought and waterlogging.
• Planting out into cold soil too early, which stunts plants for weeks.
• Giving up after one bad spell. Fruit set usually resumes within a week or two once temperatures moderate.

When and where it shows up

Flowers drop during heat waves - days well above 90°F with warm nights - and during cool spells, especially nights below about 55-60°F early in the season. Eggplant is fussier about temperature than tomatoes. Look at the flowers: those with a long central style set fruit well, while short-styled flowers are a sign of stress and usually drop.

Preventing it next time

Keep watering consistent, avoid heavy nitrogen once flowering starts, and in hot climates choose heat-tolerant eggplant varieties and plan for afternoon shade during the hottest stretch of summer.