Nutsedge or Yellow Nutsedge
Cyperus esculentus · Warm-season, Perennial, C4 pathway (technically a sedge)
Grass Family
Cyperaceae (Sedge family, not true Poaceae)
Grass Category
Weed Grass / Invasive Sedge
Variety / Cultivar
Wild species, no specific turf cultivar
Hardiness Zones
USDA Hardiness Zones 3-9, highly adaptable to temperate and tropical regions, going dormant in winter as tubers survive underground.
About This Grass
An aggressive, upright, grass-like perennial weed that grows faster than typical turfgrasses, creating a distinct lighter green or yellowish-green contrast. Height can reach up to 1-2 feet if unmowed. It has a coarse texture and forms distinctive triangular stems.
Blade Characteristics
Leaves are light green to yellowish-green, glossy, narrow (3-8 mm), V-shaped to flat in cross-section with pointed tips. Vernation is folded in the triangular stem. Lacking true grass ligules and auricles, it features distinct smooth, parallel veins.
Root System
Shallow to moderate fibrous root system that produces underground stolons terminating in small, hard, nutty tubers (nutlets). High thatch-free tendency, rapid establishment, difficult to eradicate due to tubers.
Growing Information
Origin Region
Cosmopolitan distribution; native to North America and Eurasia, widely found globally in moist soils, agricultural fields, and lawns.
Growth Habit
Rhizomatous and tuber-bearing, growing in loose to dense clumps with a relatively fast rate of spread under moist conditions.
Sunlight & Water Needs
Thrives in full sun and poorly drained, wet, or over-watered soils. High water requirement, often appearing in low spots or over-irrigated turf. Tolerates poor aeration and compacted soils.
Mowing & Maintenance
Grows faster than surrounding turfgrass, quickly outgrowing mowing heights and giving a ragged appearance. Mowing at standard turf heights (2-3 inches) does not control it; requires selective chemical herbicides designed for sedges.
Special Characteristics
Low wear tolerance, poor disease susceptibility as a weed, excellent ability to outcompete standard turfgrasses in wet environments, highly persistent due to underground nutlets.
Ecological Information
Introduced/native weed depending on local context; considered a major agricultural and turf weed due to rapid propagation via tubers. Provides minimal desirable wildlife value compared to true grasses.