90-120 days to maturity Platycodon grandiflorus (Jacq.) A. DC. Balloon Flower Toraji Seeds. Non-GMO, Heirloom. Perennial in Zones 3-8. Roots can be harvested after 2-3 years. Balloon Flower can also be grown as an ornamental annual. This beautiful flower is a member of the Campanula family. In July or August, the blossoms open from a balloon shape to a large blue-violet or white 5-pointed star. In the West, it is known only as an ornamental, but this East Asian native has long been grown in China, Korea, Japan, and East Siberia for medicinal purposes. Approx 56,700 seeds / oz.