fastdrvr, As a matter of fact....watermellons LOVE the heat, and need it to grow properly....you just need to give them the water they need. and your neighbor has them floating in his pool? hmmmm seems that wouldn't keep them very cool....not a pool around here anyway....you need a good icebox!!
the square mellons...yep...seen that before...they do NOT grow that shape naturally.....but what they do is put the LITTLE mellon in a square plesiglass box and allow it to grow into that shape...they did a study and found it saves them a LOT of money in shipping them...very little lost space.