Penstemon, Dark Towers Beard Tongue 'Dark Towers'


Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Cultivar: Dark Towers
Additional cultivar information:(PP20013)
Hybridized by Lindgren
Registered or introduced: 2007
View this plant in a garden



Foliage Color:


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


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


15-18 in. (38-45 cm)


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)

Sun Exposure:

Full Sun

Sun to Partial Shade



Bloom Color:


Bloom Time:

Late Spring/Early Summer

Mid Summer


Unknown - Tell us

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 softwood cuttings

Seed Collecting:

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


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

Clovis, California

Cornwall Bridge, Connecticut

Cherry Valley, Illinois

Washington, Illinois

Rising Sun, Maryland

Norton, Massachusetts

Hopkins, Minnesota

Kasota, Minnesota

Saint Paul, Minnesota

Randolph, New Jersey

Apex, North Carolina

Elizabeth City, North Carolina

Zirconia, North Carolina

Amherst, Ohio

Lansdowne, Pennsylvania

Rockvale, Tennessee

Garland, Texas

Kalama, Washington

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Gardeners' Notes:


On Jul 9, 2012, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:

This is a lovely variety of penstemon. The foliage is very dark and glossy. It has a strong upright habit and long bloom period. The flowers are white, or nearly white, with a lavender blush. Quite pretty.


On Jun 4, 2012, myncgarden from Zirconia, NC wrote:

Second year, and only two plants, but they are both large and beautiful and look quite striking in the perennial border. Great dark burgundy foliage, stands out beautifully against a green backdrop; pale pink/white tinged flower. Plants are growing strong so far, getting about 5-6 hours of sun; no staking has been required. Each plant is about 3 ft tall and about half as wide and each one holds its own in a border where other perennials (agastache, coneflower, coreopsis, etc) are in large groupings. So far I highly recommend it.


On Jul 20, 2010, northgrass from West Chazy, NY (Zone 4b) wrote:

This plant is about 30 inches high, gets sun most of the day. It is its second year in my garden and looking good all season.