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Meadow Evening Primrose (Oenothera pilosella)

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Oenothera Pilosella, or more commonly know as Meadow Evening Primrose, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with gray-green foliage and purple flowers of the genus Oenothera. It has a moderate 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 late spring, is somewhat tolerant of shade and is routinely available commercially. Oenothera Pilosella or Meadow Evening Primrose's floral region is North America US Lower 48, specifically in the states of Alabama, Arkansas, Connecticut, Iowa, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maine, Michigan, Missouri, Mississippi, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Texas, Virginia, Vermont and Wisconsin.

  • Category: Dicot
  • Genus: Oenothera
  • Family: Onagraceae
  • Order: Myrtales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Forb/herb
  • Native Status: L48 (N) CAN (N)
  • National Wetland Indicator Status: FACU+ FAC
  • Regional Wetland Indicator Status: 1(FAC) 2(FACU+) 3(FAC-) 6(FAC)
  • Active Growth Period: Spring and Summer
  • After Harvest Regrowth Rate: Slow
  • Allelopath: No
  • Bloat: None
  • C:N Ratio: Low
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Color: Purple
  • Flower Conspicuous: Yes
  • Foliage Color: Gray-Green
  • Foliage Porosity Summer: Moderate
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Fine
  • Fruit/Seed Color: Brown
  • Fruit/Seed Conspicuous: No
  • Growth Form: Stoloniferous
  • Growth Rate: Moderate
  • Height Mature (feet): 2
  • Leaf Retention: No
  • Lifespan: Moderate
  • Low Growing Grass: No
  • Nitrogen Fixation: Low
  • Resprout Ability: No
  • Shape and Orientation: Semi-Erect
  • Toxicity: None
  • Adapted to Coarse Textured Soils: No
  • Adapted to Fine Textured Soils: No
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: Medium
  • CaCO3 Tolerance: Low
  • Cold Stratification Required: No
  • Drought Tolerance: Low
  • Fertility Requirement: Medium
  • Fire Tolerance: High
  • Frost Free Days Minimum: 90
  • Hedge Tolerance: None
  • Moisture Use: Medium
  • pH (Minimum): 5.8
  • pH (Maximum): 7.2
  • Planting Density per Acre Minimum: 2700
  • Planting Density per Acre Maximum: 4800
  • Precipitation (Minimum): 35
  • Precipitation (Maximum): 50
  • Root Depth Minimum (inches): 8
  • Salinity Tolerance: None
  • Shade Tolerance: Intermediate
  • Temperature Minimum (°F): -23
  • Bloom Period: Late Spring
  • Commercial Availability: No Known Source
  • Fruit/Seed Abundance: Medium
  • Fruit/Seed Period Begin: Spring
  • Fruit/Seed Period End: Summer
  • Fruit/Seed Persistence: No
  • Propagated by Bare Root: Yes
  • Propagated by Bulbs: No
  • Propagated by Container: No
  • 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: 700000
  • Seed Spread Rate: Slow
  • Seedling Vigor: Medium
  • Small Grain: No
  • Vegetative Spread Rate: None


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