- You will get 500 Seeds of Watermelon Radish Non-GMO Heirloom Vegetable Seeds. - Genus: Raphanus. - 500 Watermelon Radish Seeds AKA Chinese Red Meat, Roseheart Non-GMO Heirloom. - Watermelon is an attractive radish that has white skin with green shoulders and a pink interior. - It is sweet and delicious when eaten raw or cooked. It can be from 2-4” in diameter depending on growing conditions. - For the brightest pink color plant in rich soil and keep moist. 30-60 days.