Plantaginaceae
Smooth Wasatch Penstemon
Penstemon cyananthus var. subglaber var. subglaber
Also known as Penstemon, Smooth Beardtongue, Glabrous Wasatch Beardtongue, Penstemon holmgrenii
Flowering Plants · Native Plants · Penstemon · Smooth Foliage · Blue Flowers · Rocky Mountain · Native · Perennial · Pollinator · Wildflower · Part-Shade · Rare
Smooth Wasatch Penstemon is a rare variety distinguished by its notably glabrous (smooth) foliage and vivid blue tubular flowers native to the northern Rocky Mountain states. It prefers well-drained soils and partial shade, making it ideal for naturalized mountain garden settings in Idaho, Montana, Utah, and Wyoming. Water regularly during establishment, then reduce frequency as this slow-growing perennial adapts to its environment.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water deeply until soil is moist, then allow to dry between waterings · Every 7-10 days
- Maintenance
- Moderate
- Soil
- sandy loam
- Soil pH
- 5.8–7.4
- Temperature
- -25°F to 90°F
- Cycle
- Perennial
Hardiness
USDA 4b-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 2 ft
- Spread
- 12 in
- Spacing
- 18 in apart
- Growth rate
- Slow
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Idaho, Montana, Utah, Wyoming
- Attracts
- Bees, Hummingbirds, Butterflies
Sources: trefle, usda
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