Actaea, Autumn Snakeroot, Black Cohosh, Bugbane 'Hillside Black Beauty'

Actaeasimplex

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Actaea (ak-TEE-uh)
Species
simplex (SIM-plecks)
Synonym
Cimicifuga racemosa
Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade
Foliage
Grown for foliage
Herbaceous
Smooth
Height
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
Spacing
36-48 in. (90-120 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
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)
Bloom Color
White/Near White
Bloom Time
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Dark/Black
Where to Grow
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
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Patent expired
Propagation Methods
By dividing the rootball
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:

Wyanet, Illinois

Iowa City, Iowa

Freedom, Maine

Ellicott City, Maryland

Bridgewater, Massachusetts

Salem, Massachusetts

East Tawas, Michigan

Minneapolis, Minnesota

Saint Paul, Minnesota

Kalispell, Montana

Sparks, Nevada

Scotch Plains, New Jersey

Cato, New York

Greene, New York

Youngstown, New York

Boone, North Carolina

Chesterland, Ohio

MCMINNVILLE, Oregon

MacMinnville, Oregon

Norristown, Pennsylvania

Roanoke, Virginia

Seattle, Washington

Madison, Wisconsin

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Gardener's Notes:

5
positives
2
neutrals
1
negative
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R
Greenfield, NH | September 2019 | neutral

Lovely foliage but mine isn't more than a foot tall after a few years. Might be in too much shade; there has also been some suspected dee...Read More

S
Roanoke, VA (Zone 7a) | December 2012 | positive

I grow the "Black Cohosh" in my shade garden in Roanoke, VA. It does very well and has beautiful blooms. A friend gave me mine and she sa...Read More

Y
Youngstown, NY | July 2012 | negative

I planted 6 black cohosh roots / bulbs this spring. Only 3 came up, and since May they have only grown to about 10 inches. The soil is go...Read More

7
Arlington Heights, IL | June 2012 | neutral

I LOVE this plant but I have had trouble with it. The first year, it was okay until Sept-Oct. Went out and the plant was totally gone....Read More

B
(Zone 7a) | December 2006 | positive

In the Baltimore, Maryland area, this plant produces a lot of viable seed which has self-sowed in our garden. The offspring's leaves are...Read More

N
Sparks, NV (Zone 7a) | April 2005 | positive

This plant survived the winter, but it was a little slow to appear (well, slow by my impatient standards) this spring. It's up now. It ...Read More

T
St. John's, NL (Zone 5b) | December 2004 | positive

This new selection is even blacker than 'Brunette'. Otherwise, everything else about the plant is the same as for C. ramosa. More sun w...Read More

L
Baltimore, MD (Zone 7a) | December 2004 | positive

The foliage is absolutely beautiful .. no afternoon sun on it however...the flowers in September are intoxicatingly fragrant.

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