Dusty Beardtongue
Penstemon comarrhenus
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Plantaginaceae
- Genus:
- Penstemon
- Species:
- Penstemon comarrhenus
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 4-6 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- may, jun, jul
- Bloom Colors:
- Blue, Violet
Native Range
United States: Arizona, Colorado, New Mexico, Nevada, Utah
Soil Requirements
- Soil Type:
- well-drained, rocky or sandy soil
- pH:
- 6.0 - 8.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to arid, mountainous regions
Germination Information
Pre-treatment: Seeds require a pre-treatment of 12 weeks of winter conditions at 34°F.
Establishment: The germination rate varies depending on the timing of seeding after winter conditions. Nearly 100% of viable seeds germinated when seeded in early spring after winter conditions, while around 75% germinated when seeded in mid-spring after winter, and only 25% when seeded in late spring after winter. Further research is needed to confirm the specific length of winter conditions needed to break dormancy and allow germination.
Source: npn.rngr.net