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§1 Plant

Agrostis gigantea Roth

vernacular redtop — species · Poaceae

USDA
AGGI2
GBIF
2706541
Rank
species
redtop (Agrostis gigantea)
Platephotograph · hannahvinceletteCC BY-NC source · iNaturalist ↗

§2Habit & range

Habit and range

Growth habit
Graminoid
Duration
Perennial
Group
Monocot
Family
Poaceae Barnhart
Genus
Agrostis
§2a

Native status, by region

  • AK Alaska Introduced
  • CAN Canada Introduced
  • GL Greenland Introduced
  • L48 Lower 48 States Introduced
§2b

County-level range

· 1,035 counties across 42 states/territories
Legend Native · 0 Introduced · 1035 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought
Low
Shade
High
Moisture use
Medium
Fire
High
Salinity
Low
Anaerobic
Medium
CaCO₃
Low
Hedging
None
§3b

Climate & soil

Cold tolerance
-38 °F minimum
Frost-free days
90 min.
Precipitation
28–60 in/yr
pH range
4.5–8
Root depth
14 in min.
Fertility need
Low
Soil texture
medium, fine
§3c

Form & growth

Growth form
Rhizomatous
Growth rate
Rapid
Lifespan
Short
Mature height
2 ft
Foliage texture
Fine
Foliage colour
Green
Porosity (summer)
Dense
Porosity (winter)
Porous
Flower colour
Yellow
Fruit colour
Brown
Fire resistant
No
N fixation
None
Toxicity
None
§3d

Reproduction

Bloom period
Mid Spring
Seed abundance
High
Seed begins
Summer
Seed ends
Summer
Spread rate
Slow
Stratify
No
Seeds / lb
4,851,200
Propagation
seed
§3e

Use & availability

Commercial availability
Routinely Available
Nursery stock
No
Browse palatability
High
Graze palatability
High
Palatable, human
No
Protein potential
Medium
Lumber
No
Christmas tree
No

§4Counties, by state

Recorded in 1,035 counties across 42 states/territories.

Alabama view state ↗ 2 I ▾
Alaska view state ↗ 1 I ▾
Arizona view state ↗ 4 I ▾
Arkansas view state ↗ 8 I ▾
California view state ↗ 39 I ▾
Colorado view state ↗ 34 I ▾
Delaware view state ↗ 1 I ▾
District of Columbia view state ↗ 1 I ▾
Georgia view state ↗ 3 I ▾
Idaho view state ↗ 1 I ▾
Illinois view state ↗ 102 I ▾
Indiana view state ↗ 60 I ▾
Iowa view state ↗ 5 I ▾
Kansas view state ↗ 3 I ▾
Kentucky view state ↗ 61 I ▾
Louisiana view state ↗ 6 I ▾
Maine view state ↗ 16 I ▾
Maryland view state ↗ 2 I ▾
Massachusetts view state ↗ 14 I ▾
Michigan view state ↗ 56 I ▾
Minnesota view state ↗ 60 I ▾
Mississippi view state ↗ 7 I ▾
Missouri view state ↗ 64 I ▾
Nevada view state ↗ 14 I ▾
New Hampshire view state ↗ 10 I ▾
New Jersey view state ↗ 11 I ▾
New Mexico view state ↗ 21 I ▾
New York view state ↗ 56 I ▾
North Carolina view state ↗ 1 I ▾
Ohio view state ↗ 6 I ▾
Oklahoma view state ↗ 5 I ▾
Oregon view state ↗ 16 I ▾
Pennsylvania view state ↗ 67 I ▾
Rhode Island view state ↗ 5 I ▾
South Dakota view state ↗ 1 I ▾
Tennessee view state ↗ 41 I ▾
Utah view state ↗ 2 I ▾
Vermont view state ↗ 14 I ▾
Virginia view state ↗ 85 I ▾
Washington view state ↗ 17 I ▾
West Virginia view state ↗ 46 I ▾
Wisconsin view state ↗ 67 I ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/AGGI2 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/2706541 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T20:46:58Z