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Wild Comfrey, Hound's Tongue

Cynoglossum virginianum

Family: Boraginaceae
Genus: Cynoglossum (SIGH-no-gloss-um) (Info)
Species: virginianum (vir-jin-ee-AN-um) (Info)
Synonym:Cynoglossum virginianum var. virginianum



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


24-36 in. (60-90 cm)


9-12 in. (22-30 cm)


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)

Sun Exposure:

Sun to Partial Shade


Unknown - Tell us

Bloom Color:

White/Near White

Bloom Time:

Mid Spring

Late Spring/Early Summer



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry

Properly cleaned, seed can be successfully stored


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

Piedmont, Missouri

Gardeners' Notes:


On Oct 13, 2004, gardengirl57200 from Bismarck, ND (Zone 3b) wrote:

Hound's tongue grows wild here and it is a dangerous plant. Cattle and horses won't eat it when the summer grass is good, but when they are foraging more in the fall, they get into it. It causes destruction of the liver cells and keeps new cells from re-generating, so about 6 to 9 months after ingesting it, an animal will die for no apparent reason. Once the plant is eaten, there is nothing that can be done to save the animal. Our state spends hundreds of thousands of dollars a year to attempt to eradicate the plant. Birds eat the seeds and they pass through them without losing the ability to germinate so it is easily spread far and wide. It is also spread by water so is often found along riverbanks. Please don't voluntarily spread this plant. In fact, if you plant it in your garde... read more


On Oct 12, 2004, CatskillKarma from West Kill, NY wrote:

Been thinking of platnting some of this over the ashes of our deceased coonhound as a memorial. Does anyone know where to order plants or seeds?