This heirloom Chinese Daikon radish has a colorful surprise inside! Watermelon radishes are crisp with a mild flavor, slightly peppery with lovely sweet notes. They can be eaten raw or cooked, on their own or paired with a wide variety of foods. The average size of watermelon radishes is about 3 inches in diameter, although they vary up and down by an inch or more. Their greens are edible but are a bit rougher than other hearty greens.