Black Diamond Watermelon Seeds

Black Diamond is a classic heirloom watermelon variety known for producing large, heavy fruits that typically weigh between 20 and 25 pounds. The melons are oblong in shape and feature a very dark, nearly black rind that provides excellent protection for the fruit. Inside, the bright red flesh is sweet, crisp, and incredibly juicy, making it a summertime favorite for fresh eating. These vigorous vines require a significant amount of space to spread, usually needing 6 to 8 feet between plants to grow effectively. They perform best in well-drained soil and require full sun to develop their high sugar content and characteristic sweetness. To determine ripeness, gardeners look for the spot where the melon touches the ground to turn yellow or listen for a low ‘thunk’ sound. This variety is a reliable producer that has remained popular for generations due to its consistent quality and impressive size. The thick rind makes these watermelons easier to handle and transport compared to thinner-skinned varieties. Our non-GMO seeds are treated with Thiram to prevent seed decay, damping-off, and seedling blight.