30+ Giant Black Diamond Watermelon Seeds | Seed Supply | Plants on sale online
 
 
Giant Black Diamond Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Giant watermelon. Developed in Arkansas in the 1950s.
 
 
Called black diamond because of its deep, dark green skin, it contrasts beautifully with intensely bright red flesh.
This watermelon can grow an average 30 - 50 lbs!!