What is a watermelon radish? This radish is an unusual and colorful heirloom from China that could be called the Inside Out Radish. The large softball-sized globes are greenish-white on the outside, but have a bright reddish-pink heart on the inside. They have a milder flavor than most radishes. Watermelon radish seeds are ready in 55 days.
These watermelon radish seeds are a type of Japanese winter radish also known as a "daikon," which simply means "large root" in Japanese. Daikon radishes account for the largest percentage of any cultivated vegetable in Japan, and can be found in some form in nearly every meal of that country. Watermelon radishes, which orginated in north China near Beijing, are often served sweetened there as a dessert or fruit.