Veronicastrum Species, Bowman's Root, Culver's Root, Blackroot, Great Virginian Speedwell

Veronicastrumvirginicum

Genus
Veronicastrum (ver-on-ee-KAS-trum)
Species
virginicum (vir-JIN-ih-kum)
Synonym
Veronica virginica
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
4-6 ft. (1.2-1.8 m)
Spacing
18-24 in. (45-60 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)
Danger
N/A
Bloom Color
Medium Purple
White/Near White
Bloom Time
Mid Summer
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
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
Regional

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

Ketchikan, Alaska

Mud Bay, Alaska

Saxman, Alaska

Fayetteville, Arkansas

Kiowa, Colorado

Lula, Georgia

Anna, Illinois

Aurora, Illinois

Hanna City, Illinois

Washington, Illinois

Waukegan, Illinois

Anderson, Indiana

Greenville, Indiana

Iowa City, Iowa

West Buxton, Maine

Riverdale, Maryland

Rohrersville, Maryland

Garden City, Michigan

Mendon, Michigan

Redford, Michigan

West Olive, Michigan

Brewster, Minnesota

Minneapolis, Minnesota

Rochester, Minnesota

Lincoln, Nebraska

Frenchtown, New Jersey

Neptune, New Jersey

Colden, New York

Kerhonkson, New York

Pittsford, New York

Boone, North Carolina

Durham, North Carolina

Columbus, Ohio

Wadsworth, Ohio

Beaverton, Oregon(12 reports)

Downingtown, Pennsylvania

Doylestown, Pennsylvania

Wilkes Barre, Pennsylvania

Cranston, Rhode Island

Burns, Tennessee

Arlington, Virginia

Charlottesville, Virginia

Leesburg, Virginia

Roanoke, Virginia

Vienna, Virginia

Olympia, Washington

Sammamish, Washington

Westfield, Wisconsin

show all

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Gardener's Notes:

8
positives
2
neutrals
0
negative
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J
Collierville, TN | November 2021 | neutral

Received some roots from a trade from Chris. Hope they grow well in my zone 7b garden.

C
ROSLINDALE, MA | April 2016 | positive

A fine architectural perennial.

In my experience, this plant needs regular irrigation here (Boston, MA). It is one of the ...Read More

R
Downingtown, PA | February 2014 | positive

This native to eastern North America is a handsome, clean, neat, easy, and reliable perennial that is upright in habit. When plants becom...Read More

P
Arlington, VA | July 2012 | positive

I planted Culver's root because I wanted a native plant that would attract native bees. I have two types - both are tall plants with spi...Read More

G
(Zone 5a) | February 2012 | positive

Does amazingly well in an amazingly difficult area ... by the fence where the neighbor's greedy maple tree shades. Mostly clay, some san...Read More

S
Mendon, MI | July 2011 | positive

I found this pretty plant growing on my property along the St. Joseph river. It has been left growing wild there and comes back every ye...Read More

C
Lula, GA (Zone 7b) | June 2011 | positive

For me, the species is not as robust as 'Lavender Towers,' although it is still a very good performer. It gets 6 ft + tall and is in full...Read More

C
Kerhonkson, NY (Zone 5a) | July 2008 | positive

Mine is at least 6 feet high if not higher in acid clay soil in zone 5a ... it's huge! Beloved of bees ...

L
Grove City, OH (Zone 6a) | August 2002 | positive

This plant thrives in drought conditions as well as very moist. Rich fertile soil makes the stems weak, making it more suitable to poor ...Read More

J
J
MD &, VA (Zone 7b) | January 2001 | neutral

Veronicastrum only has 2 species, both perennial herbs closely related to Veronica. Native to USA. It used to be used medicinally but now...Read More

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