Penstemon strictus (Rocky Mountain Beardtongue)
Rocky Mountain Penstemon, Rocky Mountain Beardtongue, Strict Beardtongue, Toadflax Beardtongue
A long-lived western native, Penstemon strictus (Rocky Mountain Beardtongue) is an evergreen perennial boasting abundant spires of large, royal-blue to purple flowers rising above a low foliage mat. Blooming for several weeks in late spring and early summer, the tubular flowers attract scores of hummingbirds, bumblebees and other beneficial pollinators. The lustrous emerald green leaves, ranging from grass-like to lance-shaped, remain fresh looking year-round. The beautiful flowers and handsome evergreen foliage make Penstemon strictus attractive for ornamental and landscape plantings. Easy to grow, fuss-free, water-wise, it is perfect for the sunny garden.
- Grows up to 18-30 in. tall and wide (45-75 cm). Self-sows mildly
- Performs best in full sun in light, dry, well-drained soils. Drought tolerant once established. Tolerates heavy soils and moisture better than most penstemons.
- Provides a bold and striking impact in beds and borders, cottage gardens, rock gardens or in containers. Plant in bold groupings.
- No serious pest or disease issues.
- Deadhead after flowering to promote vigor.
- Propagation by seed or root division. Barely scratch seeds into the soil in fall. Make root divisions in early spring, making sure each division has at least one bud.
- Native from southern Wyoming to Arizona and New Mexico.
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Requirements
Hardiness | 3
– 8 |
---|---|
Climate Zones | 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 10, 11, 12, 13 |
Plant Type | Perennials |
Plant Family | Penstemon - Beardtongues |
Exposure | Full Sun |
Season of Interest |
Spring (Late) Summer (Early) |
Height | 1' – 3' (30cm – 90cm) |
Spread | 1' – 3' (30cm – 90cm) |
Spacing | 36" (90cm) |
Water Needs | Low |
Maintenance | Low |
Soil Type | Chalk, Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Well-Drained |
Characteristics | Showy, Evergreen |
Native Plants | United States, Rocky Mountains, Colorado, Utah, Wyoming, Southwest, Arizona, New Mexico |
Tolerance | Drought, Dry Soil, Rocky Soil |
Attracts | Bees, Hummingbirds |
Garden Uses | Beds and Borders |
Garden Styles | Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow |
By Arina P Habich, Shutterstock
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Requirements
Hardiness | 3
– 8 |
---|---|
Climate Zones | 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 10, 11, 12, 13 |
Plant Type | Perennials |
Plant Family | Penstemon - Beardtongues |
Exposure | Full Sun |
Season of Interest |
Spring (Late) Summer (Early) |
Height | 1' – 3' (30cm – 90cm) |
Spread | 1' – 3' (30cm – 90cm) |
Spacing | 36" (90cm) |
Water Needs | Low |
Maintenance | Low |
Soil Type | Chalk, Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Well-Drained |
Characteristics | Showy, Evergreen |
Native Plants | United States, Rocky Mountains, Colorado, Utah, Wyoming, Southwest, Arizona, New Mexico |
Tolerance | Drought, Dry Soil, Rocky Soil |
Attracts | Bees, Hummingbirds |
Garden Uses | Beds and Borders |
Garden Styles | Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow |