Penstemon serrulatus (Cascade Penstemon) CC DP


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Plant Description: A perennial herb from a branching, woody base which contains several stems and is found in moist to wet meadows, forest openings, and along streambanks. Tubular, hairless deep blue to dark purple flowers grow in one or more inflorescences with compact clusters on a stem. Hairless, opposite leaves grow directly on the stems and have saw-toothed margins. The leaves are lance-shaped to oblong egg-shaped. 

  • Height: 8-28"
  • Width: 10-12"
  • Watering needs: Moderate, drought tolerant. Moist, well-drained soil
  • Sun needs: Partial shade to full sun
  • Soil needs: Well draining
  • Bloom Time: Early to late summer
  • Portland Plant List (Backyard Habitat Certification): Yes

Landscape Use and Ecological Function: One of the most adaptive Penstemon species, cold, moisture, and drought tolerant. Great for beds and borders, cottage gardens, and along streams and ponds. Flowers are attractants to local bees and other pollinators. 

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