Agastache, Anise-Hyssop, Hummingbird Mint 'Black Adder'

Agastache

Family
Lamiaceae (lay-mee-AY-see-ee)
Genus
Agastache (ah-gas-TAH-kee)
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
Shiny/Glossy
Height
24-36 in. (60-90 cm)
Spacing
18-24 in. (45-60 cm)
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)
Bloom Color
Blue-Violet
Medium Purple
Bloom Time
Late Summer/Early Fall
Other Details
Category
Herbs
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Can be grown as an annual
Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From softwood cuttings
From semi-hardwood cuttings
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Richmond, California

Denver, Colorado

Washington, District of Columbia

Brooksville, Florida

Deland, Florida

Atlanta, Georgia

Lula, Georgia

Saint Charles, Illinois

Hebron, Kentucky

Franklin, Massachusetts

Topsfield, Massachusetts

Wayland, Massachusetts

Harbert, Michigan

Pinconning, Michigan

Hopkins, Minnesota

Ocean Grove, New Jersey

Accord, New York

Coram, New York

Elba, New York

Elizabeth City, North Carolina

Greensboro, North Carolina

Geneva, Ohio

Hulbert, Oklahoma

Norman, Oklahoma

Malvern, Pennsylvania

Norristown, Pennsylvania

Conway, South Carolina

Knoxville, Tennessee

Belton, Texas

Conroe, Texas

Dallas, Texas

Houston, Texas

Centreville, Virginia

Leesburg, Virginia

Freeland, Washington

Kalama, Washington

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Gardener's Notes:

8
positives
1
neutral
0
negative
Sort By:
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M
Hopkins, MN (Zone 4a) | September 2012 | positive

I live in zone 4a and have grown Blue Fortune, Golden Jubilee, Honey Bee Blue and Black Adder successfully in multiple places in my yard ...Read More

C
C
HARBERT, MI | July 2012 | positive

I can't say enough nice things about the "Black Adder" variety of Agastache! I have a collection of uber-pricy tetraploid daylilies and ...Read More

M
Franklin, MA | August 2011 | positive

Love this plant! Easy to grow, bees love it! BUT mine has grown 6 feet tall plus!!! I'm 5'7" and it's taller than me. This one I have in ...Read More

G
Harpersfield, OH (Zone 5a) | April 2010 | positive

This plant did fantastic in my zone 5a garden this winter. It is a huge mound already and very green and healthy looking. We had one of...Read More

S
Norristown, PA (Zone 6b) | September 2009 | positive

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 ver...Read More

S
S
(Zone 8b) | February 2008 | positive

Hybridized by Coen Janssen (Netherlands). Probably a cross between A. rugosum and A. foeniculum. I've been told that most flowers are ste...Read More

P
Denver, CO (Zone 5b) | November 2007 | positive

This overwintered in my zone 5 garden. It is a great plant that likes it dry. Needs no care except for proper placement- well drained soil and sun.

M
Hebron, KY | July 2007 | positive

Beautiful Agastache! I've been growing it since 2005 or 2006.

B
Braselton, GA (Zone 8a) | March 2007 | neutral

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 pur...Read More

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