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Yellow Penstemon (Penstemon confertus)

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Penstemon Confertus, or more commonly know as Yellow Penstemon, is a subshrub forb/herb with green foliage and yellow flowers of the genus Penstemon. It has a rapid growth rate and a height of 2 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during mid summer, is tolerant of shade and is routinely available commercially. Penstemon Confertus or Yellow Penstemon's floral region is North America US Lower 48, specifically in the states of Idaho, Montana, Oregon and Washington.

  • Category: Dicot
  • Genus: Penstemon
  • Family: Scrophulariaceae
  • Order: Scrophulariales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Subshrub Forb/herb
  • Native Status: L48 (N) CAN (N)
  • Active Growth Period: Spring and Summer
  • After Harvest Regrowth Rate: Rapid
  • Allelopath: No
  • Bloat: None
  • C:N Ratio: Medium
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Color: Yellow
  • Flower Conspicuous: Yes
  • Foliage Color: Green
  • Foliage Porosity Summer: Porous
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Fine
  • Fruit/Seed Color: Brown
  • Fruit/Seed Conspicuous: Yes
  • Growth Form: Single Crown
  • Growth Rate: Rapid
  • Height Mature (feet): 2
  • Leaf Retention: No
  • Lifespan: Moderate
  • Low Growing Grass: No
  • Resprout Ability: No
  • Shape and Orientation: Decumbent
  • Toxicity: None
  • Adapted to Coarse Textured Soils: Yes
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: None
  • CaCO3 Tolerance: None
  • Cold Stratification Required: Yes
  • Drought Tolerance: Low
  • Fertility Requirement: Low
  • Fire Tolerance: High
  • Frost Free Days Minimum: 120
  • Hedge Tolerance: Medium
  • Moisture Use: Medium
  • pH (Minimum): 6
  • pH (Maximum): 7.5
  • Planting Density per Acre Minimum: 1700
  • Planting Density per Acre Maximum: 2700
  • Precipitation (Minimum): 15
  • Precipitation (Maximum): 65
  • Root Depth Minimum (inches): 6
  • Salinity Tolerance: None
  • Shade Tolerance: Tolerant
  • Temperature Minimum (°F): -23
  • Bloom Period: Mid Summer
  • Commercial Availability: No Known Source
  • Fruit/Seed Abundance: High
  • Fruit/Seed Period Begin: Spring
  • Fruit/Seed Period End: Fall
  • Fruit/Seed Persistence: No
  • Propagated by Bare Root: No
  • Propagated by Bulbs: No
  • Propagated by Container: Yes
  • Propagated by Corms: No
  • Propagated by Cuttings: No
  • Propagated by Seed: Yes
  • Propagated by Sod: No
  • Propagated by Sprigs: No
  • Propagated by Tubers: No
  • Seed per Pound: 4628571
  • Seed Spread Rate: Rapid
  • Seedling Vigor: High
  • Small Grain: No
  • Vegetative Spread Rate: None


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