Q.Black Ends And Then Rotting
Mine grow and then get this black spot on the end of them before rotting. What can I do to stop this?

Certified GKH Gardening Expert
We are not sure what kind of plant you are talking about, but the problem is called blossom end rot. Here are a couple articles on how to fix it in both tomatoes and squash:
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-blossom-end-rot-causes-and-treatment.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm
If your problem plant is a melon, then the advice in the squash article will help.