Hardiness: 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)
On Mar 22, 2006, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
This is a vigorous tall plant, often taller than I am (at 5 feet 11 inches) It have suprising shade tolerant but prefer part shade at woodland edge. It blooms rather heavily, even when you cut it back. It is one of the last flowers to bloom, just before some variety of asters. It multiply like crazy, but I have not seen any seedlings. It have a tight group of basal leaves then suddenly send up stems sparely laced with leaves up to six to eight feet before blooming. May dislike dry soil. Bees seem to loves it, but so does a kind of aphid that often infects asters and other coneflowers. The aphids is bold red in color and there seem to be no predators willing to eat them. Often my hands are stained red after crushing them!
On Jul 29, 2005, paste592 from Westminster, MD (Zone 6b) wrote:
This is not a plant that I would move into the perennial bed -- it's quite tall, and the blossoms are more acid-yellow than I like for blending. However, for the edges of the woods, they are nice -- before they bloom, the foliage isn't really gangly as you might expect, and the blossoms are plentiful and small in relation to the plant's height. Mine were a gift from another MG, and I'm hoping they multiply quickly (as they are said to reseed readily) -- I could use 50 more!!
This plant has been said to grow in the following regions:
Vincent, Alabama Flagstaff, Arizona Lula, Georgia Geneva, Illinois Westminster, Maryland Midland, Michigan Pinconning, Michigan Minneapolis, Minnesota Elsberry, Missouri Frenchtown, New Jersey Kure Beach, North Carolina Salem, Oregon Ashley, Pennsylvania Valencia, Pennsylvania West Goshen, Pennsylvania Okatie, South Carolina Arlington, Tennessee Newport News, Virginia