Cascade Penstemon
Penstemon serrulatus
Clustered heads of deep blue-purple bells top leafy stems in summer, tolerating more moisture and shade than most penstemons. An easy, bee-loved native for westside gardens.
- Family
- Plantaginaceae
- Type
- shrub
- Lifespan
- perennial
- Height
- 1–2.5 ft
- Spacing
- 1–1.5 ft apart
- Light
- part shade
- Soil moisture
- wet
- Soil pH
- acidic, neutral
- Bloom
- June, July, August
- Bloom colors
- blue, purple
- Wildlife value
- pollinators, hummingbirds, butterflies, larval host
- Caterpillar hosts
- ~8 butterfly & moth species
- Landscape uses
- foundation, rain garden
- Native states
- AK, OR, WA
Related native plants
More Penstemon species
- Large Beardtongue (Penstemon grandiflorus)
- Foxglove Beardtongue (Penstemon digitalis)
- Cobaea Beardtongue (Penstemon cobaea)
- Scarlet Bugler (Penstemon centranthifolius)
- Palmer's Penstemon (Penstemon palmeri)
- Beardlip Penstemon (Penstemon barbatus)