75-90 days.

Black Diamond is a classic oblong watermelon with a black-green rind covering bright red, crisp, flavorful flesh. In the 1950s, Black Diamond was a very popular home garden variety.

The Black Diamond Watermelon produces an abundance of the giant, juicy and delicious tasting emerald green fruits! These watermelons are large with a wonderful bright red flesh. In warmer climates this watermelon variety will start producing during the mid-season

Contains 20 heirloom seeds