Radish Seeds - Giant Luo Buo. Heirloom, Non-GMO. Raphanus sativus. 80-100 days. Cool season annual. This large oval white radish grows 8-10" long and 5-6" in diameter and is very popular in Taiwan. The flesh has a sweet and mild flavor. It can weigh 2-2.5 lbs. ~ 3,000 seeds / oz.