I planted 4 Moon and Stars Watermelon plants in late May. The vines look good-vigorous and healthy and have produced lots of flowers. Every time I find a little watermelon, I mulch under it with straw, hoping it won't rot. So far, I've lost 7 or 8 little melons-they look good, for a while-maybe grow anywhere to an inch to 4 inches long, then start to look pale, then start rotting. I do have one melon that's made it-still growing- measured the circumference at 19 inches, so it's looking good. But what happened to the others? And it's still happening-found another rotten baby, this morning.
I have side dressed all the melon plants with compost, fed twice with compost tea and I use a seaweed foliar spray every couple of weeks. Our weather, here, has been hot and humid, but without a lot of rain, so I water with soaker hoses every few days.
Hope someone has some ideas-thanks!