My wonderful watermelons were growing so great and now they have black ends like they are rotting inside. I don't have tons of room for them and they have grown across my bricks could the sun be heating the bricks and burning them? But what is strange is the spot that is touching the ground is fine its the ends that are burned/rottedd looking. Here are some pictures it seems like they are starting to get worse on the smaller ones too. The smaller ones I'm sure aren't save-able but the larger ones I hope are. I will be so diappointed if I don't get to eat any of them Does anyone have any idea what going on here? What can I do?