Georgia rattlesnake is one of the best tasting but any watermelon will do great. The key is massive amounts of water. If you don't water them the plant will grow but the fruit will die or be small at best. They also grow well in low lying swampy areas which few plants grow in. You can flood the entire field for short periods of time. The largest watermelon farm in the united states is south Florida around arcadia. Also the heat doesn't bother them and they like sandy soil. Florida is ideal for watermelon though they grow just about anywhere.