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Hemp Dogbane, Indian Hemp
Apocynum cannabinum

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Apocynum (a-POS-ih-num) (Info)
Species: cannabinum (kan-na-BIN-um) (Info)

Category:

Perennials

Height:

36-48 in. (90-120 cm)

Spacing:

24-36 in. (60-90 cm)

Hardiness:

USDA Zone 1: below -45.6 C (-55 F)

USDA Zone 2a: to -45.5 C (-50 F)

USDA Zone 2b: to -42.7 C (-45 F)

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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Danger:

Seed is poisonous if ingested

Parts of plant are poisonous if ingested

All parts of plant are poisonous if ingested

Bloom Color:

Cream/Tan

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Herbaceous

Blue-Green

Shiny/Glossy-Textured

Other details:

May be a noxious weed or invasive

Soil pH requirements:

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:

From seed; direct sow outdoors in fall

From seed; stratify if sowing indoors

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Regional

This plant has been said to grow in the following regions:

Barling, Arkansas

Cordele, Georgia

Rockford, Illinois

Benton, Kentucky

Clermont, Kentucky

Danville, Kentucky

Elizabethtown, Kentucky

Frankfort, Kentucky

Georgetown, Kentucky

Henderson, Kentucky

Irvine, Kentucky

Jackson, Kentucky

Kuttawa, Kentucky

Louisville, Kentucky (3 reports)

Madisonville, Kentucky

Nicholasville, Kentucky

Brookeville, Maryland

Laurel, Maryland

Minneapolis, Minnesota

Cole Camp, Missouri

Protem, Missouri

Frenchtown, New Jersey

Mount Laurel, New Jersey

Glouster, Ohio

Hulbert, Oklahoma

Millersburg, Pennsylvania

Wilkes Barre, Pennsylvania

Herndon, Virginia

show all

Gardeners' Notes:

1
positive
3
neutrals
1
negative
RatingContent
Positive

On Jun 15, 2013, annerem from Northern IL, IL (Zone 5a) wrote:

I got some of this from a friend's property but began yanking it after the bees didn't show any interest in it. I plant my native gardens for pollinators. NOW, I read that it's a host plant for Hummingbird Moths and Monarchs.

I'm giving it a positive for this reason. Of course, it's easy to grow :-) and it provides necessary hosts plants for some our most treasured wildlife species.

Neutral

On Apr 11, 2010, WUVIE from Hulbert, OK (Zone 7a) wrote:

This plant is not the best choice for fussy gardeners. It is a plant, it has a mission, and it travels quite well. In fact, it very much reminds me of the growth patterns of running bamboo. Many feet from the mother plant you will find shoots popping up here and there.

I don't mind it, I simply run over the unwanted with the lawn mower. Yes, it will grow back, but not worth getting terribly excited about.

Neutral

On Nov 28, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Hemp Dogbane Apocynum cannabinum is native to Texas and other States.

Neutral

On Jan 23, 2005, melody from Benton, KY (Zone 7a) wrote:

All parts of this plant are poisionous, and it needs to be kept from livestock and children.

A common fence row plant, it thrives in sunny, overgrown locations.
It needs to be pulled out before it sets seed.

Negative

On Nov 11, 2004, CaptMicha from Brookeville, MD (Zone 7a) wrote:

A fast spreading weed. Thrives in almost any spot but especially sunny and well drained soil.