Geranium Species, Black Widow, Dusky Cranesbill, Hardy Geranium, Mourning Widow

Geraniumphaeum

Family
Geraniaceae (jer-ay-nee-AY-see-ee)
Genus
Geranium (jer-AY-nee-um)
Species
phaeum (FAY-um)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade
Partial to Full Shade
Foliage
Herbaceous
Height
24-36 in. (60-90 cm)
Spacing
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Hardiness
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
N/A
Bloom Color
Dark Purple/Black
Maroon/Burgundy
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
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)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
Seed Collecting
Bag seedheads to capture ripening seed
Properly cleaned, seed can be successfully stored
Regional

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

Seward, Alaska

San Francisco, California

Somerville, Massachusetts

Grand Marais, Michigan

Pittsford, New York

Oklahoma City, Oklahoma

Equinunk, Pennsylvania

Newburg, Pennsylvania

Pittsburgh, Pennsylvania

Wilkes Barre, Pennsylvania

Richmond, Virginia

Kalama, Washington

New Lisbon, Wisconsin

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Gardener's Notes:

4
positives
2
neutrals
1
negative
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K
New Lisbon, WI (Zone 4b) | June 2015 | neutral

I like this plant for its lovely leaves, and cute little flowers, but it is trying to compete with my woodland poppy to see who can take...Read More

N
Grand Marais, MI | June 2010 | negative

Although some of the flowers are pretty and all are handsome, I have declared this a public menace in our garden. It simply seeds too fr...Read More

F
San Francisco, CA | April 2008 | positive

This is a hardy, spreading, non-invasive geranium. Both the lovely foliage and flowers contribute to a woodland appearance. It divides ea...Read More

W
Seward, AK (Zone 3b) | July 2007 | positive

This is one of my favorite hardy geranium. It has a neat clump form in the spring, and the leaves are zoned with a dark pattern. As the s...Read More

M
Richmond, VA (Zone 7a) | July 2003 | positive

this is a good plant in my area. I have found a mid/late summer shearing will yield a good fall bloom

H
| July 2002 | positive

Vigorous plant that thrives in shady, moist, acidic conditions.

Flowers are highly attractive to bees. Will tolerate prun...Read More

B
B
Baa
| September 2001 | neutral

Clump forming hardy Geranium from moutainous regions of Europe and Western Russia. Has lobed, soft green, slightly hairy leaves sometime...Read More

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