I think I've not given my melons enough foreplay either.
I tactfully left out mentioning how horribly my melons fail.
I think I am going to try the Moon & Stars watermelons this year with black plastic mulch and a mini hoop over them to see if I can push them into sweetness.
I would think melons need lots of water, but since you have that covered and are still failing, maybe it's a mineral deficiency of some sort.
Ugh, I wish I knew more about melons, but I have kind of given up!!
