My squash, that is mounded as usual but in the same bed as last yr with compost amendment, begins with 3 to 4" fruit, then begins to rot shrivel up, then falls off. Is that a nutrient problem, like not enough potassium, or is it due to too much moisture? (we've had a rainy 30 days-over 20")
What Causes Squash to Rot Fall Off When Small?
Certified GKH Gardening Expert
It sounds like you are having pollination issues. When the flowers are not properly pollinated, the plant will reject the fruit while they are just a few inches long. You may need to hand pollinate. Here is more information: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm