Watermelon radish (Raphanus sativus 'Watermelon') is a larger radish that is white with pale green shoulders on the outside and red on the inside, looking like a watermelon. The watermelon radish is best grown in cool weather.
Watermelon radishes are an heirloom variety of Daikon radish. An interesting watermelon radish fact tells us that the Chinese word for these radishes is ShinRi-Mei, meaning “beauty in the heart.” One only needs to slice into one of these beauties to understand the meaning behind the name. Their Latin name is Raphanus sativus acanthiformis. As to what watermelon radishes taste like, they have a milder, understated taste compared to their brethren and are a bit less peppery in flavor. Unlike other varieties, the flavor actually mellows even further the more mature the radishes become. Because these are an heirloom variety, finding watermelon radish seeds might require a bit more of a search than going to the local five and dime but well worth the effort.