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Redtop (Agrostis gigantea)

  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Misc. Publ. No. 200. Washington, DC. 1950. | USDA PLANTS Database | License: PD USDA
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: Kristian Peters -- Fabelfroh 07:06, 19 August 2007 (UTC) | photographed by Kristian Peters | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Misc. Publ. No. 200. Washington, DC. 1950. | USDA PLANTS Database | License: PD USDA
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: Kristian Peters -- Fabelfroh 07:07, 19 August 2007 (UTC) | photographed by Kristian Peters | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: Kristian Peters -- Fabelfroh 07:07, 19 August 2007 (UTC) | photographed by Kristian Peters | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: User:Rasbak | Own work | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: User:Rasbak | Own work | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: User:Rasbak | photograph by User:Rasbak | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: User:Rasbak | photograph by User:Rasbak | License: CC-BY-SA-3.0-migrated GFDL
  • Redtop (Agrostis Gigantea) https://www.sagebud.com/redtop-agrostis-gigantea/
    Credit: User:Rasbak | Own work | License: CC-BY-SA-3.0-migrated GFDL
AGGI2.jpg

Agrostis Gigantea, or more commonly know as Redtop, is a graminoid with green foliage and yellow flowers of the genus Agrostis. 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 spring and is intolerant of shade. Agrostis Gigantea or Redtop's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Delaware, Georgia, Iowa, Idaho, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin and Wyoming.

  • Category: Monocot
  • Genus: Agrostis
  • Family: Poaceae
  • Order: Cyperales
  • Class: Liliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Graminoid
  • Native Status: L48 (I) AK (I) CAN (I) GL (I)
  • National Wetland Indicator Status: FAC?
  • Regional Wetland Indicator Status: 1(NI) 2(NI) 3(NI) 4(NI) 5(NI) 6(NI) 7(NI) 8(NI) 9(NI) 0(NI) A(NI)
  • Active Growth Period: Spring and Summer
  • After Harvest Regrowth Rate: Moderate
  • Allelopath: No
  • Bloat: Low
  • C:N Ratio: Medium
  • Coppice Potential: No
  • Fall Conspicuous: No
  • Fire Resistance: No
  • Flower Color: Yellow
  • Flower Conspicuous: No
  • Foliage Color: Green
  • Foliage Porosity Summer: Dense
  • Foliage Porosity Winter: Porous
  • Foliage Texture: Fine
  • Fruit/Seed Color: Brown
  • Fruit/Seed Conspicuous: No
  • Growth Form: Rhizomatous
  • Growth Rate: Rapid
  • Height Mature (feet): 2
  • Leaf Retention: No
  • Lifespan: Short
  • Low Growing Grass: Yes
  • Resprout Ability: No
  • Shape and Orientation: Decumbent
  • Toxicity: None
  • Adapted to Coarse Textured Soils: No
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: Medium
  • CaCO3 Tolerance: Low
  • Cold Stratification Required: No
  • Drought Tolerance: Low
  • Fertility Requirement: Low
  • Fire Tolerance: High
  • Frost Free Days Minimum: 90
  • Hedge Tolerance: None
  • Moisture Use: Medium
  • pH (Minimum): 4.5
  • pH (Maximum): 8
  • Precipitation (Minimum): 28
  • Precipitation (Maximum): 60
  • Root Depth Minimum (inches): 14
  • Salinity Tolerance: Low
  • Shade Tolerance: Intolerant
  • Temperature Minimum (°F): -38
  • Bloom Period: Mid Spring
  • Commercial Availability: Routinely Available
  • Fruit/Seed Abundance: High
  • Fruit/Seed Period Begin: Summer
  • Fruit/Seed Period End: Summer
  • Fruit/Seed Persistence: No
  • Propagated by Bare Root: No
  • 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: 4851200
  • Seed Spread Rate: Slow
  • Seedling Vigor: High
  • Small Grain: No
  • Vegetative Spread Rate: Rapid


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