Photo by Melody

PlantFiles: Beardtongue, Beard Tongue, Penstemon
Penstemon x mexicali 'Red Rocks'

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

6 vendors have this plant for sale.

8 members have or want this plant for trade.


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)

Sun Exposure:
Full Sun
Sun to Partial Shade


Bloom Color:

Bloom Time:
Late Spring/Early Summer


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
This plant is resistant to deer

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

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There are a total of 13 photos.
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6 positives
1 neutral
No negatives

Gardeners' Notes:

Positive Cheryl_103 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.

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

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

Positive shelly80504 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.

Positive cedar18 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.

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

Beautiful! I love it! Great addition!

Positive penpen 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.

Neutral smiln32 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.


This plant has been said to grow 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
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
Vernal, Utah
Leesburg, Virginia
Lexington, Virginia
Chimacum, Washington
Columbus, Wisconsin

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