zucchini fruit staying small
I have two zucchini plants in a large pot that I have been growing in a greenhouse. They are producing fruit now, but when the zucchini get 2-3" long they stop growing. They have been this size for the past six days.
Certified GKH Gardening Expert
It is a pollination problem. In the greenhouse, they likely do not have any pollinators. You will need to hand pollinate. This article will help: