My husband has two tomatillo plants which he is trying to grow. The problem we are having is we have tomatillos growing on them and they are small, maybe the size of a grape tomato, but they keep falling off the plant before they are full grown. What is causing this to happen and is there something we can do to stop it? We would appreciate any help you can give us in this matter.
This is a sign of a pollination problem. These articles will help:
(Tomatillos are closely related to tomatoes so hand pollination would be the same) https://www.gardeningknowhow.com/edible/vegetables/tomato/pollinate-tomatoes.htm