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Family: Lamiaceae (lay-mee-AY-see-ee) (Info) Genus: Agastache (ah-gas-TAH-kee) (Info) Cultivar: Black Adder Additional cultivar information: (aka Blackadder) Hybridized by Janssen
Hardiness: 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)
On Sep 29, 2009, stormyla from Norristown, PA (Zone 6b) wrote:
This is a wonderful plant with a very long bloom period. I have it growing in the windiest dryest section of my shady bed. It blooms very well under Maples and never bends in the wind.
On Feb 24, 2008, saya from Heerlen Netherlands (Zone 8b) wrote:
Hybridized by Coen Janssen (Netherlands). Probably a cross between A. rugosum and A. foeniculum. I've been told that most flowers are sterile. That explains the long flowering season.
On Mar 6, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:
2-3 ft plants produce smoky-purple flowers from mid-summer well into fall. For an added bonus, in Autumn the stalks and foliage turn purple as well. Does great in containers. Perennial to zone 7.
Regional...
This plant has been said to grow in the following regions:
Denver, Colorado Brooksville, Florida Deland, Florida Atlanta, Georgia Lula, Georgia Saint Charles, Illinois Hebron, Kentucky Wayland, Massachusetts Pinconning, Michigan Accord, New York Elizabeth City, North Carolina Hulbert, Oklahoma Norristown, Pennsylvania Conway, South Carolina Knoxville, Tennessee Belton, Texas Dallas, Texas Houston, Texas Kalama, Washington
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