Blossom drop happens when a fruit tree's flowers fall off before setting fruit, and it can be discouraging after waiting all season for a harvest. Here's what usually causes it.
Temperature Swings
Sudden temperature swings, especially unseasonable heat or a late cold snap, can stress flowers enough to cause them to drop before pollination occurs.
Inconsistent Watering
Both drought stress and overwatering can trigger blossom drop. Aim for even, consistent moisture through the flowering period rather than letting the soil swing between soaked and bone dry.
Poor Pollination
Without enough pollinator activity, flowers may open, fail to be pollinated, and drop without ever setting fruit. Planting pollinator-friendly flowers nearby can help attract more bees.
Nutrient Imbalance
Too much nitrogen relative to phosphorus and potassium can push a tree toward leafy growth at the expense of fruit set, increasing blossom drop. A bloom-specific fertilizer can help rebalance things.
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