Cardwell's Penstemon
Penstemon cardwellii

Family: Plantaginaceae
Genus: Penstemon (PEN-stem-on) (Info)
Species: cardwellii (card-WELL-ee-eye) (Info)
View this plant in a garden

Category:

Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

Height:

6-12 in. (15-30 cm)

Spacing:

12-15 in. (30-38 cm)

Hardiness:

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:

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Rose/Mauve

Blue-Violet

Bloom Time:

Late Spring/Early Summer

Foliage:

Herbaceous

Other details:

Unknown - Tell us

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:

From woody 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:

Monmouth, Oregon

Mount Hood Parkdale, Oregon

Portland, Oregon

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Dec 16, 2011, cg_portland from Portland, OR wrote:

This is a native in the Pacific Northwest, it has done well in a predominantly dry bed under a native Garry oak and beside other PNW natives, occasional water the first summer. Mine blooms May-August

Positive

On Jan 22, 2005, Todd_Boland from St. John's, NL (Zone 5b) wrote:

Another member of the Dasanthera Section, this one is relatively easy to accomodate. It can take a fair amount of drought but performs better with adequate moisture. Plants form an evergreen subshrub to nearly 2 feet. Winter foliage can turn purplish. Typically the flowers are purple to blue-purple but I grow a dwarfer, reddish-pink flowered version called 'Roseus'. The blooms are relatively large.