Hardiness: USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F)
Propagation Methods: By dividing the rootball From herbaceous stem cuttings From seed; winter sow in vented containers, coldframe or unheated greenhouse From seed; stratify if sowing indoors From seed; sow indoors before last frost
On Jun 20, 2006, lottathyme from Scottsville, NY wrote:
Have had this in my garden for the past 10 years after buying it labeled as "Feverfew." I never knew what it really was till last year. It has been great for me. Makes neat, tidy plants that bloom and bloom ALL SUMMER! Flowers are a crisp white with a bit of yellow in the center...great blenders. Foliage has a crisp herbal scent if you handle it. Unlike the other comment, I get tons of self-sown seedlings, but they are not thugs like other plants I've had (perennial bachelor button, etc.) You can easily pull them out, or repot and give to other gardeners. Plus, they are easily transplanted...I just moved a full sized plant in bloom, in 90 degree heat, and with a lot of watering it has come through just fine. Other times they will wilt but leaf back out if you cut them back. Bugs don't bother them, they don't require fertilizer or other care, bloom all summer, and look great with everything else or in bouquets..what more could you want?
On Aug 8, 2003, olds88lady from Macon, GA (Zone 8b) wrote:
Started blooming in May in middle Georgia and has bloomed since. I love it because foliage has stayed nice and the flowers are so daintly and pretty - we have had record rains w/a surplus of 15 inches and it still is doing good in my sandy but compost and cow manure enriched soil. I saw an article on the Japanese Aster a year or so ago in Better Homes and Gardens magazine and really wanted the plant but could not find. Last year I bought this Genghis Khan Aster not realizing it was the Japanese Aster I had been searching for at nurseries. It is as good or better than the magazine said it would be.
On Aug 4, 2003, Ladyfern from Jeffersonville, IN (Zone 6a) wrote:
Once this plant starts blooming in July, it just won't quit! Needs no deadheading since the dead flowers shrivel up to small nubbins and I've never found self-sown seedlings. Fills up its space with wonderful fluffy flowers. A great filler plant for the perennial bed. Can dig up side shoots in the spring and they'll root themselves wherever you put them.
On Aug 31, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:
Closely resembling the Boltonia Aster, K. pinnatifida is prized for its steady stream of hundreds of 1" white blooms from mid-summer until late in the fall. Many varieties are doubles, resembling chrysanthemum.
This plant has been said to grow in the following regions:
Heber Springs, Arkansas Timber Pines, Florida Atlanta, Georgia Macon, Georgia Oak Park, Indiana Beverly, Massachusetts Hamilton, New Jersey Schenectady, New York Scottsville, New York Raleigh, North Carolina (2 reports) Cambridge, Ohio Defiance, Ohio Fruit Hill, Ohio Ashley, Pennsylvania Conway, South Carolina Elizabethton, Tennessee Mc Lean, Virginia Milwaukee, Wisconsin