New to growing. Started with a compost pile and as that started to get bigger I began to notice I had plants starting to grow out of the pile. I said what the heck Ill take them out of the compost and start to grow them. At first I thought they were pepper because I had a lot of peppers composted over the months. As they got bigger I realized they weren't peppers and thought they were squash, but now that they are fruiting i don't know what they are. So what like some help and see if anyone can give me a little insight to what they are. Also as of recently they stopped growing as big. Anything I should be doing to the soil during the fruiting stages.