Whipple's Penstemon, Whipples Beardtongue
Penstemon whippleanus

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Species: whippleanus (whip-pel-AH-nus) (Info)

Category:

Perennials

Foliage Color:

Dark/Black

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

Height:

24-36 in. (60-90 cm)

Spacing:

18-24 in. (45-60 cm)

Hardiness:

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

Danger:

Unknown - Tell us

Bloom Color:

Scarlet (Dark Red)

Maroon (Purple-Brown)

Bloom Time:

Late Spring/Early Summer

Foliage:

Evergreen

Smooth-Textured

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:

Non-patented

Propagation Methods:

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

Regional

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

Castro Valley, California

Parker, Colorado

Riverton, Utah

Santaquin, Utah

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Jul 3, 2005, hanna1 from Castro Valley, CA (Zone 9a) wrote:

A somewhat rare plant, native to the Southwest, rows well here. Striking, deep burgundy flowers with pin-striped, cream colored throat on 2' plant. Blooms in late summer. Soft green, lance-like leaves. Cold stratify seeds.

Positive

On Jan 23, 2005, Todd_Boland from St. John's, NL (Zone 5b) wrote:

This is a rather tall penstemon for a rock garden (to 2 feet)but does look its best in a rock garden setting. It can be used towards the back of a rock garden. The flowers are relatively large and quite variable in colour. Colours include cream, pale yellow, gray-green, blue-green and a rich wine-purple, the latter being the preferred colour. The plants can tolerate moister and more acidic soils than many penstemon so is a useful species for gardeners in E. North America.