Foothill Penstemon
Penstemon heterophyllus 'True Blue'

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Species: heterophyllus (het-er-oh-FIL-us) (Info)
Cultivar: True Blue

Category:

Alpines and Rock Gardens

Perennials

Height:

12-18 in. (30-45 cm)

Spacing:

9-12 in. (22-30 cm)

Hardiness:

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)

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

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

Sun Exposure:

Full Sun

Danger:

N/A

Bloom Color:

Medium Blue

Bloom Time:

Mid Summer

Foliage:

Herbaceous

Other details:

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

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

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; sow indoors before last frost

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:

Long Beach, California

Watervliet, Michigan

Salt Lake City, Utah

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Jun 22, 2007, dicentra63 from West Valley City, UT (Zone 6b) wrote:

I grew my specimens from seed, and they thrived for about 4 years before becoming weak and dying after 5 years.

I don't know if it was too cold for them (Zone 6b) or if there was too much freezing and thawing for them.

But while they lasted, they were spectacular. The blue color is electrifying, and the touch of violet at the throat emphasized the blue. I couldn't walk by without noticing how amazing that shade of blue was.