Can someone tell me how to help my watermelons? I planted a smaller variety like icebox or sugar babies and they start to gro but then begin to turn black and fall off the plant after only getting about the size of a quarter anyone have any ideas? I also have beef steak tomatoes that keep rotting on the bottom of the fruit before even getting to their full size and turning. Does anyone have any advice for me on either? I’ve already lost our cucumber plants this year to powdery mildew I’d hate to lose more plants!