Outsidepride China Aster Powder Puff Flower Seed Mix - 5000 Seeds Aster Powder Puff Mix grows as an annual mix in USDA Zones: 3 - 8 and thrives in full sun to partial shade areas. Callistephus Chinensis, also known as China Aster grows up to 24 inches tall and makes a wonderful cut flower. This easy to grow flower is deer resistant and is often used in flower beds and borders or as a container plant. Sow these heirloom seeds at 4 - 5 seeds per plant in well-drained soil and keep moist until germination occurs in 8 - 10 days. Our seeds are always Non-GMO and packaged for the current year.