The Black Diamond watermelon is an heirloom, open-pollinated variety, distinct from many modern hybrids found in grocery stores. It is primarily recognized by its impressive size, often growing to weights well over 30 pounds, making it one of the largest cultivated watermelons. Its name comes from its physical appearance, characterized by a deep, dark green rind that appears almost black, generally lacking the distinct stripes of other common varieties. This cultivar is sought after for its robust flavors, which require a long growing season to fully develop.
The Distinct Flavor Profile
The defining characteristic of the Black Diamond watermelon is its intense sweetness, often perceived as richer and more concentrated than contemporary melons. This high level of sweetness is due to a robust accumulation of natural sugars within the deep red flesh. While the primary taste is sugary, the flavor profile is balanced by subtle acidic notes and a slight tanginess that prevents it from tasting cloyingly sweet. This variety delivers a classic, robust, full-bodied flavor that holds up well when chilled or used in recipes. The taste is straightforward, emphasizing a pure, sweet fruit essence.
Texture and Physical Traits
The internal structure of the Black Diamond offers a dense and satisfying mouthfeel. The flesh is firm and crisp, providing a distinct snap when bitten into, unlike the softer texture of some other varieties. It remains exceptionally juicy, holding a high water content that contributes to the melon feeling substantially heavy for its size. The color of the flesh is a vibrant, deep red or bright pinkish-red, contrasting with the dark rind. The thickness and hardness of the rind provide a natural protective layer, functioning to retain moisture and keep the flesh preserved longer after harvest.
Selecting a Ripe Black Diamond
Achieving the optimal flavor profile relies on selecting a melon that has fully ripened on the vine. Selection starts by checking the field spot, the area where the melon rested on the ground. For this variety, the spot should be a deep, creamy yellow or orange color, indicating sufficient maturity. A ripe fruit will also feel substantial and heavy when lifted, and tapping it should produce a deep, hollow sound. Shoppers should also look for a rind that appears dull rather than shiny, as a loss of glossiness signals that the melon is fully mature.