Beardtongue, Beard Tongue 'Prairie Dusk'

Penstemon barbatus

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Species: barbatus (bar-BAY-tus) (Info)
Cultivar: Prairie Dusk



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


4-6 ft. (1.2-1.8 m)


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)

Sun Exposure:

Full Sun


Unknown - Tell us

Bloom Color:



Bloom Time:

Mid Summer



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us


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

Palm Springs, California

Nampa, Idaho

Machesney Park, Illinois

Fishers, Indiana

Hebron, Kentucky

Marlborough, Massachusetts

Pinconning, Michigan

Hopkins, Minnesota

Saint Paul, Minnesota

Litchfield, New Hampshire

Dallas, Oregon

Pittsburgh, Pennsylvania

Renfrew, Pennsylvania

Salt Lake City, Utah

Charlottesville, Virginia

Kalama, Washington

show all

Gardeners' Notes:


On Mar 26, 2012, astrogard from Gig Harbor, WA wrote:

Is the listed color (red, pink) correct? Haven't planted mine yet, but it was sold to me as purple, and the photos look pretty much purple.


On Jul 6, 2011, greyandamy from Pittsburgh, PA wrote:

Though in gritty soil that's not too wet, and full sun, this plant seems to easily flop. And the blooms don't seem to last long. I'm trying to decide if it needs staked, or how to better meet it's needs. Rather unattractive (to me) as the flowers start browning from base up. I haven't noticed butteflies yet.


On May 28, 2010, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:

Overall, this plant is stunning when it's in bloom, but rather uninspiring when it's not. The bloom period is not as long as I expected, and I have not had sucess trying to get it to rebloom. It also seems to die out and get woody in the middle, so I've dug it up and divided it every year. I do have to say it's blooming beautifully this year, however.


On Jul 31, 2006, Gazania_in_pa from Renfrew, PA (Zone 5a) wrote:

This plant with it's bright purple long lasting blooms was loved by bees, hummingbirds and butterflies. It was a very bright spot in my garden beginning in early June when there seems to be a lull in blooming plants.


On Dec 31, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

This plant produces tall bright purple tubular blooms in early summer. Plant height is 30 and a spread of 12-18. The foliage is beautiful all year long. Plant it in full sun and in well-drained soil. Medium growth rate. Can tolerate dry conditions. Attracts butterflies and hummingbirds.