“Though I water and fertilize my squash plants well, a lot of the fruit seem to just shrivel up! What can I do?” Question from Kyra of White Salmon, Washington
Answer: Sorry to hear your squash crop isn’t cooperating! I would love to hear what squash you are growing and determine at what stage they are shriveling up. Are your squash little or well developed when they start to shrivel? Either way, there are two key reasons why squash fruits may not develop properly.
1. Lack of pollinators
Squash have two flower types, male and female, and these are strictly bee-pollinated. The male flowers are produced first, followed by the female blooms. If you see female blooms on your plants, and no bees, this could be the problem.
Without pollination, the developing fruits just shrivel. You can try a hand-pollinating method, if you think this is the problem. Simply use a small brush to move pollen from a newly opened male flower to a newly opened female flower. It’s fast, easy, and will yield squash!
Some fungal diseases and disorders will cause fruit to shrivel up at various stages of development. A picture may help me identify the cause, if you don’t think pollinators are your problem.
Black Gold Horticulturist