Barnyard Grass
Echinochloa crus-galli · Warm-season, Annual, C4
Grass Family
Poaceae, subfamily Panicoideae, tribe Paniceae
Grass Category
Weed/Invasive Grass, Wetland/Riparian Grass
Variety / Cultivar
Wild type (no specific cultivated variety)
Hardiness Zones
Thrives in USDA Hardiness Zones 3 through 10 as a warm-season annual, completing its life cycle in a single growing season and dying with the first heavy frost.
About This Grass
An aggressive, coarse annual grass growing up to 2 to 5 feet tall. It has a light green to medium green coloration, sometimes tinged with purple at the base. The texture is coarse, and the plant forms an open, upright structure. It produces large, branched, nodding panicles with densely crowded spikelets that often feature bristly awns.
Blade Characteristics
Blades are flat, smooth, coarse, typically 6 to 20 mm wide, with a pointed tip and prominent midrib. Vernation is rolled in the bud. Ligule is completely absent. Auricles are absent. Collar is broad and continuous.
Root System
Fibrous, moderately deep root system with fast establishment speed. Does not form a dense turf sod; tends to grow as scattered individual clumps or dense weed patches.
Growing Information
Origin Region
Native to tropical and temperate Asia and Europe, now widely naturalized globally in agricultural and disturbed soils.
Growth Habit
Bunch-type, forming loose clumps with erect to ascending stems, occasionally rooting at lower nodes.
Sunlight & Water Needs
Requires full sun. High water needs, commonly found in wet soils, ditches, irrigated fields, and poorly drained areas. Tolerates temporary flooding and damp conditions well. Prefers fertile, moist soils.
Mowing & Maintenance
Typically managed as a weed rather than a maintained turf; can survive low mowing temporarily by growing prostrate, but thrives when left unmowed. High maintenance as an agricultural weed requiring herbicide or mechanical removal.
Special Characteristics
High seed production, highly competitive in agricultural settings (especially rice and corn), tolerant of wet soils, poor wear tolerance for turfgrass use, highly invasive in disturbed wet areas.
Ecological Information
Introduced species in North America. Provides limited food for waterfowl and seed-eating birds, but is primarily considered a noxious agricultural weed. Helps stabilize disturbed wet soils temporarily, but outcompetes native vegetation.