Three-hulled Rush (Triglumis)

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

The Three-hulled Rush (Triglumis) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, seed, sprigs. It has a moderate 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 -23°F. has low tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Moderate
General Type Graminoid
Growth Period Spring, Summer
Growth Duration Perennial
Lifespan Moderate
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Summer
Displays Fall Colors No
Shape/Growth Form Bunch
Drought Tolerance Low
Shade Tolerance Intolerant
Height When Mature 0.8
Vegetative Spread None
Flower Color White
Flower Conspicuousness No
Fruit/Seed Abundance Low
Fruit/Seed Seasonality Summer Summer
Seed Spread Rate Moderate
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Seed, Sprigs
Moisture Requirements High
Cold Stratification Required No
Minimum Temperature -23
Soil Depth for Roots 8
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Slow
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 6–7.5 pH
Precipitation Range 12–12 inches/yr
Planting Density 4800–11000 indiv./acre
Soil Textures Medium
Soil Depth for Roots 8
Minimum Frost-Free Days 135 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability Medium
Fire Resistant No
Causes Livestock Bloating None

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