hey sarah,
I too started mine about the same time yours were in ground it seems. I have my FIRST melon
growing now, we had some colder weather here for the longest time but now its plenty warm! Bees are out doing their thing, so i dont have to try and keep up hand pollinating everything. I dont have watermelons, but i do have cantaloupes. As i said, first one is
growing with several behind it! Give it a lil time, and i DO deadhead all my vines! It doesnt have seem to hurt the
plant at all, in fact after doing so i noticed i had a gumball size melon turn into a monster 1 lb. (prolly the size of a nerf football) in 2 days time! So i suggest pruning the ends of your vines and keep them where you want them. . it doesnt seem to do any harm!
GL! And just wait for them melons. . you'll have more than u can eat soon