Barnyardgrass
Echinochloa crus-galli · Warm-season, Annual, C4
AI-generated identification · may be incorrect
Grass Category
Invasive/Weed Grass, Pasture/Forage Grass
Hardiness Zones
Thrives across USDA Hardiness Zones 3 through 10, completing its life cycle during warm summer months as a warm-season annual.
Grass Family
Poaceae, subfamily Panicoideae, tribe Paniceae
Variety / Cultivar
Wild type (no specific ornamental or agricultural cultivars typically distinguished in wild populations)
About This Grass
An aggressive, coarse annual grass forming large, robust clumps. Unmowed height can reach 2 to 5 feet. Color is bright to medium green, sometimes tinged with purple at the base. Texture is coarse with wide, flat leaves. Notable features include prominent, branching, millet-like seed heads at maturity that often droop slightly.
Blade Characteristics
Blades are wide (>4mm, typically 6-15mm), flat, hairless, and smooth with a pointed tip. Color is light to medium green with a prominent whitish midrib. Vernation is rolled in the bud. Ligule is absent (no membrane or fringe of hairs). Auricles are absent. Collar is broad and continuous.
Root System
Fibrous root system, moderately deep for an annual. Establishes rapidly from seed, producing high seed volume. Lacks rhizomes or stolons, relying entirely on heavy seed production for propagation and survival.
Growing Information
Origin Region
Native to tropical and temperate Asia, now cosmopolitan and widely naturalized globally in warm-temperate to tropical agricultural regions
Growth Habit
Bunch-type (clump-forming) annual with erect or decumbent stems, spreading primarily by seed
Sunlight & Water Needs
Requires full sun for optimal growth. High water requirement, frequently found in moist soils, ditches, wetlands, and irrigated crop fields. Moderate drought tolerance once established in wet soils, but thrives in damp, nutrient-rich environments. Prefers fertile, moist loam or clay soils.
Mowing & Maintenance
Mowing maintenance is generally considered weed control rather than turf management. Low mowing heights can suppress seed production but resilient clumps can survive close grazing or cutting. High maintenance when acting as a major agricultural weed in crops.
Special Characteristics
Low wear tolerance as a single bunch grass, but highly competitive against desirable crops and turf. Excellent resistance to standard herbicides depending on biotype. High seed production makes it a persistent weed. Can tolerate temporary flooding and waterlogged soils well.
Ecological Information
Introduced species in many regions outside Asia, often acting as a noxious agricultural weed in rice and corn fields. Provides limited wildlife value as a food source for waterfowl and granivorous birds eating the seeds. Can help stabilize disturbed, wet soils temporarily as a pioneer annual.