cascade penstemon
Penstemon serrulatus
USDA zones3 to 9
SunHandles full sun to partial shade
WaterHandles moderate to wet soil
Size12 to 24 inches tall12 inches wide
- Habit
- Herb
- Bloom season
- Summer
- Bloom color
- Blue , purple
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
Cascade penstemon (Penstemon serrulatus) is a perennial for borders and low maintenance gardens. It is hardy to USDA zone 3, or down to -40°F (-40°C). This plant likes full sun to part shade and average to wet soil of most types. Deep blue to purple tubular flowers bloom from early to late summer. Hummingbirds, bees, and butterflies visit them. It is not a favorite of deer, though hungry deer will eat almost anything.
Pairs well with Sensitive fern, Smooth hydrangea, and Blonde Ambition blue grama.
Native range
AK, OR, and WA; BC.