The best luck I has with watermelons was when I used to raise chickens in a pasture. I fed the chickens an old Hemstead melon and they passed the seeds in the pen. The area really got wet in the winter so I moved the pen to higher ground. When I went mow the grass down in the spring - the whole area was full of some of the biggest melons I have ever seen. Never had much luck trying to grow them on purpose but they worked great on accident. I guess they work best if you just plant them in really fertile ground and leave them alone... or get you a bunch of chickens and well, you know, wait till spring...