Watermelon Blooms but No Fruit: Pollination Problems

Healthy vines, plenty of male flowers, bees present—but no fruit. Likely causes:

• Female flowers not pollinated: Only 1 in 7 flowers is female. Bees may prefer oregano.
• Hand pollination failed: Must transfer pollen from male to female stigma before noon on day flower opens.
• Heat/humidity: Over 90°F + high humidity kills pollen viability.

Solutions

• Plant bright flowers (zinnias, marigolds) near melons to attract bees.
• Hand-pollinate early morning; use a small brush.
• Ensure consistent moisture—drought stresses flowers.

Consult a vegetable specialist (e.g., Elyse Grau) for variety-specific advice.