Aster Sinensis Callistephus chinensis

Callistephus chinensis, or China aster, is a cool weather annual with many cultivars and colors to choose from. The plant grows easily in rich, moist, well-drained soils in full sun to part shade. If grown from seed, you should plant in pots indoors about 6 to 8 weeks before the last spring frost date. You can set the seedlings or purchased plants outside after the last frost date. Alternatively, you can sow seed directly in the garden after last frost date and at two week intervals thereafter to ensure constant blooms. Keep the soil moist, provide good air circulation around the plants, and, in some case, provide support for tall plants. 

China aster displays showy, 3-5-inch diameter blooms from early summer to fall. A large number of cultivars are available that range in height from 8 to 36 inches and whose flower appearance ranges from single daisy-like flower heads with yellow centers to fully double flower heads with shaggy to pompom form. Colors include shades of white to pink, red, blue, violet, purple and yellow. In addition to the plants colorful appearance, it will also attract bees and other pollinators.

Diseases, Insects, and Other Plant Problems:

China aster can be prone to aphids and spider mites, leafhoppers, wilt, or stem rot. To prevent diseases (that may winter over in the soil), place plants in different locations each year. If your plants do contract a disease, it is best to dig them up and destroy them. Do not allow them to remain in the soil or near other plants.