White and green on the outside with a bright magenta pink burst in the center, watermelon radishes are named for their color and for their sweetness that is accompanied by mild to pungent spice. Absolutely beautiful in salads, slaws, pickles, and as a garnish. Most salad radishes are harvested when they’re sweet and young, but watermelon radishes are a storage radish that get sweeter as they get bigger and experience a few frosts.