Hairy Grama (Hirsuta)

The Hairy Grama (Hirsuta) is generally described as a perennial graminoid. This is native to the U.S. (United States) has its most active growth period in the summer . The greatest bloom is usually observed in the spring, with fruit and seed production starting in the spring and continuing until fall. Leaves are not retained year to year. The Hairy Grama (Hirsuta) has a long life span relative to most other plant species and a moderate growth rate.

The Hairy Grama (Hirsuta) generally appears in field collections and doesn't tend to be commercially available. It can be propagated by seed. It has a slow ability to spread through seed production and the seedlings have low vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -38°F. has high tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Moderate
General Type Graminoid
Growth Period Summer
Growth Duration Perennial
Lifespan Long
Plant Nativity Native to U.S.
Commercial Availability Field Collections Only
Physical Characteristics
Bloom Period Spring
Displays Fall Colors No
Shape/Growth Form Colonizing
Drought Tolerance High
Shade Tolerance Intolerant
Height When Mature 0.5
Vegetative Spread Slow
Flower Conspicuousness No
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Spring Fall
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Seed
Moisture Requirements Low
Cold Stratification Required No
Minimum Temperature -38
Soil Depth for Roots 16
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Moderate
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 6–7.2 pH
Precipitation Range 7–7 inches/yr
Planting Density 0–0 indiv./acre
Soil Textures Coarse, Medium
Soil Depth for Roots 16
Minimum Frost-Free Days 90 day(s)
Salinity Tolerance Low
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability Low
Fire Resistant Yes
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA