Beardtongue, Beard Tongue
Penstemon 'Stapleford Gem'

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Cultivar: Stapleford Gem
Additional cultivar information:(aka Sour Grapes - misapplied)
Hybridized by M. Fish

Category:

Perennials

Height:

18-24 in. (45-60 cm)

Spacing:

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

Hardiness:

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Blue-Violet

Purple

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall

Foliage:

Smooth-Textured

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

Propagation Methods:

By dividing the rootball

From softwood cuttings

From semi-hardwood cuttings

Seed Collecting:

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

Regional

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

Mesa, Arizona

Atlanta, Georgia

Peachtree City, Georgia

Ewing, Kentucky

Hebron, Kentucky

Albuquerque, New Mexico

Bremerton, Washington

Kalama, Washington

Vancouver, Washington

show all

Gardeners' Notes:

3
positives
1
neutral
0
negatives
RatingContent
Positive

On May 23, 2010, Kim_M from Hamburg, PA (Zone 6b) wrote:

I am impressed..."Stapleford Gem" was covered in 3 feet of snow this past winter, lived outside in a pot, and has come back bigger and stronger. It is cold hardy at least to 6b (in my findings).

Positive

On Jul 11, 2005, jamie68 from Vancouver, WA (Zone 8b) wrote:

This Penstemon is one of the most prolific of the 10 or so I have in my beds! Beautiful, long-lasting blooms, above nice medium green foliage. I look forward to seeing this plant every summer, and am rewarded with 3 solid months of bloom....July - September!!

Positive

On May 20, 2004, ambest from Riverside, CA wrote:

This plant does so well in my so. cal garden, in the winter, I cut them back with a weed-eater. They will become a groundcover if you let them run wild. Pretty flowes, easy to transplant.

Neutral

On Aug 31, 2002, Baa wrote:

A stunning cultivar.

Has long, lance shaped, mid-green leaves. Bears tubular, bluish-deep purple flowers borne over summer.

Flowers June - September

Loves a well drained soil in sun or light shade. Isn't very hardy so bring inside before it gets really cold or mulch heavily in milder climates.

Sometimes P. 'Stapleford Gem' is sold as 'Sour Grapes', 'Stapleford Gem' has whitish lower lobes.