Outsidepride Balloon Flower Blue Platycodon Grandiflorus Flower Seed - 2000 Seeds Balloon Flower Blue grows as a hardy perennial in USDA Zones: 4 - 9 and thrives in full sun to partial shade areas. Platycodon Grandiflorus is low maintenance and reaches a height of 18 inches tall with dark blue blooms in late spring to summer. These heirloom flowers are also drought tolerant and make a wonderful garden or cut flower. Sow at 4 seeds per plant in well-drained soil and keep moist until germination occurs in 14 - 21 days. Our seeds are always Non-GMO and packaged for the current year.