My zucchini plants look great, but as the fruit begins to form (about the size of your finger), the top part near the blossom (that falls off) begins to turn yellow and rot. What is wong?
Certified GKH Gardening Expert
This article can help you with that issue: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm
Mine did the same thing and I found out that I was over watering. I lost two plants but I had several growing. Now I cultivate around them and water deep but less often.