can u put asters in pots
1 While the plant can be grown from seed, germination can be uneven. 2  You can start the seeds indoors during the winter by sowing seeds in pots or flats and keeping them in the refrigerator for 4 to 6 weeks. 3  After 4 to 6 weeks, put the seeds in a sunny spot.4  Set seeds one inch deep. Space asters 1 to 3 feet apart, depending on the type. 2  Water plants in well. 3  Add mulch after planting to keep soil cool and prevent weeds.If you're replanting shoots, use vigorous, young shoots to ensure best growth.