Penstemon, Beard Tongue, Beardtongue, Pride of the Mountain 'Red Rocks'

Penstemon x mexicali

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Species: x mexicali (meks-ih-KAL-ee) (Info)
Cultivar: Red Rocks



Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade




This plant is resistant to deer

Foliage Color:



12-18 in. (30-45 cm)


12-15 in. (30-38 cm)


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)

Where to Grow:

Grow outdoors year-round in hardiness zone



Bloom Color:


Bloom Characteristics:

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

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Other details:

Unknown - Tell us

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:


Propagation Methods:

By dividing the rootball

From herbaceous stem cuttings

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:

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

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


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

Athens, Alabama

Trussville, Alabama

Colorado Springs, Colorado

Delta, Colorado

Denver, Colorado

Kiowa, Colorado

Longmont, Colorado

Loveland, Colorado

Dacula, Georgia

Guyton, Georgia

Lula, Georgia

Marietta, Georgia

Saint Charles, Illinois

Greenville, Indiana

Hebron, Kentucky

Lexington, Kentucky

Chesapeake Beach, Maryland

Dracut, Massachusetts

Weymouth, Massachusetts

Dearborn, Michigan

Minneapolis, Minnesota

Sandown, New Hampshire

Albuquerque, New Mexico

Elba, New York

North Tonawanda, New York

Charlotte, North Carolina

Columbus, Ohio

Hilliard, Ohio

Smithville, Ohio

Edmond, Oklahoma

Oklahoma City, Oklahoma

Sherwood, Oregon

Springfield, Oregon

Albion, Pennsylvania

Lancaster, Pennsylvania

Pittsburgh, Pennsylvania

Knoxville, Tennessee

Georgetown, Texas

Riverton, Utah

South Jordan, Utah

Vernal, Utah

Leesburg, Virginia

Lexington, Virginia

CHIMACUM, Washington

Columbus, Wisconsin

show all

Gardeners' Notes:


On Mar 6, 2018, noseykate from SOUTH WEYMOUTH, MA wrote:

This one takes a prize for longest-blooming flower in the garden. Tolerates heat and dry soil, just keeps blooming until frost stops it. Very pretty - photos don't do it justice - and the bees like to sip. I was worried that it wouldn't be winter hardy but so far it has done fine in zone 6a. I will always want this cultivar in the garden.


On Jul 16, 2010, Cheryl_103 from Pittsburgh, PA (Zone 6a) wrote:

This is a perennial that will actually bloom all summer. Here in Pittsburgh it starts in late May/early June, and continues until frost. It has slowed down a bit with the extreme heat we've had this month.
Needs good drainage over the winter. I lost three under very heavy snow cover last winter.


On May 3, 2010, Grinder12000 from Columbus, WI wrote:

Wonderful plant that attracts hummingbirds and butterflies. I have it with Lady in Red Salvia.


On May 29, 2009, shelly80504 from Longmont, CO (Zone 5a) wrote:

Beautiful pink/coral flowers against "waxy looking" dark green foliage. Because these don't really need any attention from me, but still look great and flowers for most of the summer/fall they are one of my personal favorites.


On Aug 6, 2008, cedar18 from Lula, GA (Zone 7b) wrote:

A great plant, it held up better after blooming than nearby P. smallii. I cut it back about 1/3 on June 15 and it's blooming again Aug. 6. The color is a bright pink and looks great with Veronica 'Red Fox.' Foliage still looks very nice.


On Nov 21, 2006, Marilynbeth from Hebron, KY wrote:

Beautiful! I love it! Great addition!


On Jun 2, 2005, penpen from North Tonawanda, NY (Zone 6a) wrote:

Seeds germinate best with cold stratification. and a great candidate for winter sowing. I winter sowed my seeds and left the containers outside all winter and every single seed sprouted in spring. Very hardy, drought tolerant and a fast grower once the temps warm up. A great addition to any hummingbird garden.


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

Plant in a full sun location with well drained soil. It can tolerate drought conditions. Great for zones 5 - 8. Beautiful magenta flowers bloom all summer long. The plant, with flowers, can reach a height of 15". Attracts hummingbirds and butterflies, too. A fast grower.