Deer Grass
Muhlenbergia rigens · Warm-season, Perennial, C4
Grass Family
Poaceae, subfamily Chloridoideae, tribe Cynodonteae
Grass Category
Ornamental Grass, Native Prairie Grass, Erosion Control
Variety / Cultivar
Species type (natural form)
Hardiness Zones
USDA Hardiness Zones 7-11; excellent heat tolerance; evergreen in warmer climates, dormant in colder zones.
About This Grass
A large, dense, architectural bunchgrass forming a fountain-like clump. It typically grows 3 feet tall and wide, with flower spikes reaching up to 5 feet. Foliage is a soft silver-green to mid-green, turning a light straw color in winter. It has a fine to medium texture and produces long, slender, whip-like panicles.
Blade Characteristics
Width: fine (2-3mm); Shape: involute (rolled) or flat, very long and arching; Tip: pointed and needle-like; Color: gray-green to medium green; Vernation: rolled; Ligule: short and membranous; Auricles: absent; Texture: scabrous (rough to the touch).
Root System
Deep, fibrous root system; high drought tolerance once established; low thatch tendency; moderate establishment speed; does not form a sod but provides excellent soil stabilization.
Growing Information
Origin Region
Southwestern United States and Mexico; adapted to chaparral, oak woodland, and desert riparian areas.
Growth Habit
Bunch-type (clump-forming); dense, non-spreading base with a large radiating fountain shape.
Sunlight & Water Needs
Full sun to light shade; requires at least 6 hours of direct sun; low water needs; high drought tolerance; prefers well-drained soil but can tolerate clay and occasional flooding.
Mowing & Maintenance
Not a turf grass; should not be mowed regularly. Maintenance includes cutting back to 4-6 inches above the ground in late winter every 1-3 years to remove old thatch; low maintenance level.
Special Characteristics
High salt tolerance; excellent deer resistance; extremely drought tolerant; provides a dramatic vertical element in landscapes; high fire resistance for a grass if kept clean of dead material.
Ecological Information
Native to CA, AZ, NM, TX; provides cover for small mammals and nesting material for birds; larvae host for several butterfly species; historically used by indigenous people for basket weaving; non-invasive.