Outsidepride Aster Pompon Blue Moon Flower Seed - 1000 Seeds Aster Pompon Blue Moon grows as an annual in USDA Zones: 3 - 9 and is a full sun loving plant but can also thrive in partial shaded areas. Callistephus flowers are easy to establish and very attractive to butterflies. They will have blooms of dark to light blue centers with white outer rims from early summer to early fall. These Blue Asters are perfect for flower gardens and because of their sturdy, 20 inch tall stems they make excellent long lasting cut flowers. Sow these heirloom seeds in well-drained soil at 3 - 5 seeds per plant and keep moist until germination occurs in 7 - 21 days. Our seeds are always Non-GMO and packaged for the current year.