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Great Coneflower (Rudbeckia maxima)

  • Great Coneflower (Rudbeckia Maxima) http://www.sagebud.com/great-coneflower-rudbeckia-maxima
    Credit: Britton, N.L., and A. Brown | An illustrated flora of the northern United States, Canada and the British Possessions. Courtesy of Kentucky Native Plant Society. | License: PD USDA NRCS
  • Great Coneflower (Rudbeckia Maxima) http://www.sagebud.com/great-coneflower-rudbeckia-maxima
    Credit: NRCS National Wetland Team, Fort Worth, TX. | Wetland flora: Field office illustrated guide to plant species | License: PD USDA NRCS
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Rudbeckia Maxima, or more commonly know as Great Coneflower, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with gray-green foliage and yellow flowers of the genus Rudbeckia. It has a rapid growth rate and a height of 9.8 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring, blooms during summer, is intolerant of shade and is routinely available commercially. Rudbeckia Maxima or Great Coneflower's floral region is North America US Lower 48, specifically in the states of Arkansas, Louisiana, Oklahoma, South Carolina and Texas.

  • Category: Dicot
  • Genus: Rudbeckia
  • Family: Asteraceae
  • Order: Asterales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Forb/herb
  • Native Status: L48 (N)
  • National Wetland Indicator Status: FAC+
  • Regional Wetland Indicator Status: 2(FAC+) 3(FAC+*) 6(FAC+)
  • Active Growth Period: Spring
  • After Harvest Regrowth Rate: Moderate
  • Allelopath: No
  • Bloat: None
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Color: Yellow
  • Flower Conspicuous: Yes
  • Foliage Color: Gray-Green
  • Foliage Porosity Summer: Porous
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Coarse
  • Fruit/Seed Color: Black
  • Fruit/Seed Conspicuous: No
  • Growth Form: Single Stem
  • Growth Rate: Rapid
  • Height Mature (feet): 9.8
  • Leaf Retention: No
  • Lifespan: Short
  • Low Growing Grass: No
  • Resprout Ability: No
  • Shape and Orientation: Erect
  • Toxicity: None
  • Adapted to Coarse Textured Soils: Yes
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: High
  • CaCO3 Tolerance: Low
  • Cold Stratification Required: No
  • Drought Tolerance: None
  • Fertility Requirement: Medium
  • Fire Tolerance: None
  • Frost Free Days Minimum: 180
  • Hedge Tolerance: None
  • Moisture Use: High
  • pH (Minimum): 4
  • pH (Maximum): 7
  • Planting Density per Acre Minimum: 2728
  • Planting Density per Acre Maximum: 10912
  • Precipitation (Minimum): 40
  • Precipitation (Maximum): 60
  • Root Depth Minimum (inches): 12
  • Salinity Tolerance: None
  • Shade Tolerance: Intolerant
  • Temperature Minimum (°F): -23
  • Bloom Period: Summer
  • Commercial Availability: No Known Source
  • Fruit/Seed Abundance: Medium
  • Fruit/Seed Period Begin: Summer
  • 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: 1000000
  • Seed Spread Rate: Moderate
  • Seedling Vigor: High
  • Small Grain: No
  • Vegetative Spread Rate: None




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