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Hardiness: 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) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F) Not Applicable
On May 19, 2013, Doublekranch from Fairmount, NY wrote:
I live in Zone 5 and have had success overwintering this plant in our cold frame. It must go in dry and stay that way until after the last hard freeze.
On Jul 22, 2010, suewylan from North Fork, CA (Zone 7b) wrote:
This is a loooooong bloomer! It's been blooming from May to July and only now, middle of July, are the flowers going to seed. It's lovely as an edging along my patio steps and also seeded itself into my herb basket. In another location, I have it as a single accent plant.
On the tag it said the flowers were nondescript, but I have use them in flower arrangements every summer. They last as dry flowers for quite awhile.
On Jan 27, 2003, Terry from Murfreesboro, TN (Zone 7a) wrote:
An interesting foliage plant; its naturally spikey habit is a little difficult to work into planting schemes, but the texture it adds is worth the extra effort.
Fairly easy to root from tip cuttings.
Regional...
This plant has been said to grow in the following regions:
Fairfield, California North Fork, California Loxahatchee, Florida New Albany, Indiana Barbourville, Kentucky Bellevue, Michigan Madison, Mississippi Metuchen, New Jersey Fairmount, New York Kure Beach, North Carolina Calcutta, Ohio Murfreesboro, Tennessee Mckinney, Texas Olympia, Washington