Hardiness: 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) USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure: Sun to Partial Shade
Danger: Handling plant may cause skin irritation or allergic reaction
Bloom Color: Light Blue Medium Blue
Bloom Time: Late Spring/Early Summer
Foliage: Grown for foliage Herbaceous
Other details: Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: By dividing the rootball From softwood cuttings From seed; direct sow outdoors in fall
Seed Collecting: Allow pods to dry on plant; break open to collect seeds
On May 7, 2012, floraphiliac from Ludington, MI (Zone 6a) wrote:
This is one of my favorite garden plants. It looks great all season long and is maintenance free. I love the texture of the foliage. I enjoy "petting" the plant, it feels like a big soft furred bush lol!
I dug up my mature specimen recently this early spring to move it and was pleased to see that it is coming along nicely, even though I accidentally cut off some long thick roots while transplanting it.
On Dec 31, 2011, windsor224 from Haycock,Bucks County, PA wrote:
One of my very favorites. Always interesting throughout it seasons. Give it a lot of room as it will have babies and fill in nicely. Transplanting of new ones is easy. They continued to grow. I just need to see if they make it through this winter in zone 6. I think they will be fine. Easy plant to share.
10/2012 all baby plants are growing nicely from last year and many more have been transplanted. Love this plant.
My Amsonia hubrichtii has gotten huge; it is currently 70 inches (178 cm) wide. It is growing it almost full sun, in lousy soil, right next to a sidewalk. I planted it about five years ago. It does self seed a little bit, but the seedlings are easy to pull out of the ground.
After my town poured new sidewalks, they filled in next to them with horrible soil. Grass wouldn't grow well in it, so I made a bed of tough, drought & salt tolerant perennials, including this Amsonia. Now that it is established, this plant receives no special care from me, and is thriving. I'm in Massachusetts, in zone 6.
On Jan 28, 2011, AuburnR from Gaithersburg, MD wrote:
I love this plant. Spring flowers are a pretty blue, then trim it back to mound it up a bit. Fall color is yellow and stands out. Plant self-seeds but transplants easily. You can collect seeds from long thin pods; just make sure the pods are grey and dry before you take them. I have read that seeds should be sown in the fall, which I didn't do, so I'll see how they manage being sown in early spring once the ground warms a bit. They are winter hardy in zone 6-7, and are native plants. No pests, no problems after 4 years growing them.
On Aug 14, 2008, cedar18 from Lula, GA (Zone 7b) wrote:
I'm impressed with how nice the plant looks all the time. Very feathery texture and great fall color. The flowers are not huge or showy but it's a great asset to the border. Great contrast with large leaves like Sedum.
On Jan 16, 2003, Terry from Murfreesboro, TN (Zone 7a) wrote:
The foliage on this species turns a beautiful golden color in the fall. Native to Arkansas and Oklahoma.
This plant has been said to grow in the following regions:
Gadsden, Alabama Houston, Alabama Cord, Arkansas Little Rock, Arkansas Clayton, California Edgewater, Colorado Brookfield, Connecticut Dewey Beach, Delaware Townsend, Delaware Commerce, Georgia Lula, Georgia Chadwick, Illinois Chicago, Illinois Mount Prospect, Illinois Plainfield, Illinois Washington, Illinois Indianapolis, Indiana Oak Park, Indiana (2 reports) Coushatta, Louisiana Fallston, Maryland Gaithersburg, Maryland Bridgewater, Massachusetts Dracut, Massachusetts Haydenville, Massachusetts Uxbridge, Massachusetts Ludington, Michigan Northfield, Minnesota St Paul, Minnesota Clinton, Mississippi Marietta, Mississippi Mathiston, Mississippi Bates City, Missouri Clearbrook Park, New Jersey Bohemia, New York Millbrook, New York Stony Point, New York Elizabeth City, North Carolina High Point, North Carolina Cincinnati, Ohio East Norriton, Pennsylvania Laflin, Pennsylvania Monroe, Pennsylvania Quakertown, Pennsylvania Florence, South Carolina Clarksville, Tennessee Nashville, Tennessee Austin, Texas Linden, Texas Arlington, Virginia Stephens City, Virginia Bellevue, Washington Kalama, Washington Cross Lanes, West Virginia Bayfield, Wisconsin Milwaukee, Wisconsin