200 Pound Watermelon . There are over 50 common types of watermelon popular around the world, while there are over 1,200 varieties in total. Grown at the hope farm store by lloyd bright, his family has a long history with watermelons: Fruit seeds 20 seeds Giant Watermelon Seeds HUGE 200 lbs,Home from www.bonanza.com Plant produces enormous watermelons as big as 200 pounds. How many pounds of water must be drained so that the watermelon is 50% water? There are over 1,200 watermelon varieties ranging in size from 1 to 200 pounds.