
Rocky Mountain penstemon
Penstemon strictus
- Mature height
- 18–30 in.
- Mature spread
- 12–18 in.
- Time to mature
- 2–3 years
- Light
- Full sun
- Water
- Low
- Deer
- Usually avoided
- Rabbits
- Usually avoided
- Ideal planting time
- Spring or early fall
Why it works: Violet-blue flower spikes in late spring and early summer.
Good for: Dry borders, pollinator beds, and naturalistic groups.
Care and possible drawbacks
Care: Leave basal foliage through winter. Cut old stems in early spring and avoid heavy mulch over the crown.
Know before planting: Short-lived in rich or poorly drained soil; allow some reseeding.



















