Bromus marginatus (Mountain brome)

Cool season, short-lived perennial bunch grass, adapted to a wide spectrum of relatively moist soils including thin, infertile sites, but is intolerant of high water tables. Establishes quickly and easily on disturbed sites. Common on foothills and mountain valleys and has good shade tolerance. Good palatability to livestock and wildlife. Performs well at high elevations.

native distribution

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Family: Poaceae

Duration: Perennial, short lived

Growth Habit: Graminoid

Native Status: Native

Season: Cool season

Growth Form: Bunchgrass

Mature Height: 48 in.

Annual Precipitation: 10-20 in.

Drought Tolerance: Medium

Shade Tolerance: Intolerant


Wetland Indicator Status:

Fire Resistance: No

Fire Tolerance: Low


Coarse Texture: Yes

Medium Texture: Yes

Fine Texture: No

Salinity Tolerance: High

CaCO3 Tolerance: Medium

pH Range: 5.5-8.0


Seeds per Pound: 64,000

Seeding Rate:  PLS lbs/acre 12-19

Season: Spring/Fall

Days to Germination:


Bromar - A tall, leafy, late-maturing strain which yields abundant forage and heavy seed. Used in mixtures throughout the western U.S. on upland or montane sites. (Released 1946, source of ecotype: Pullman, WA)

Garnet - Developed for it's head smut resistance, longevity, ease of establishment and productivity of both forage and seed. Exhibits better overall vigor and longevity than Bromar. Very winter hardy. (Released 2000, source of ecotype: Granite County, MT)

Umatilla - Source Identified selection out of Umatilla/Morrow, OR counties.