Yellow Nutsedge (Grass-like sedge commonly mistaken for grass)
Cyperus esculentus · Warm-season, Perennial, C4 sedge
Grass Family
Cyperaceae (Sedge family)
Grass Category
Invasive/Weed Grass (technically a sedge)
Variety / Cultivar
Common wild type; often considered a weed in turfgrass management
Hardiness Zones
USDA Zones 3-11; dies back to ground in winter; tubers are highly cold-tolerant and survive deep freezes.
About This Grass
An upright, yellowish-green plant with triangular stems characteristic of sedges. It grows faster than most turfgrasses, protruding above the lawn canopy. It does not produce traditional grass flowers, but rather spikelets on tall stalks.
Blade Characteristics
Waxy, thick blades with a prominent mid-rib; v-shaped in cross-section; long-tapering to a sharp point; yellowish-green color; smooth texture with no ligules or auricles.
Root System
Fibrous roots with extensive rhizomes and small starchy tubers (nutlets) that can remain dormant in the soil for years; very difficult to eradicate once established.
Growing Information
Origin Region
Native to North America, Southern Europe, Africa, and parts of Asia; adapted to wet or disturbed soils worldwide
Growth Habit
Rhizomatous with underground tubers (nutlets); aggressive spreading habit
Sunlight & Water Needs
Full sun preferred but tolerates partial shade; highly moisture-dependent, thriving in poorly drained, over-watered, or compacted soils.
Mowing & Maintenance
Grows faster than turf, often requiring more frequent mowing; resistant to many standard broadleaf and grass herbicides; requires specialty sedge killers (e.g., Sedgehammer).
Special Characteristics
Extremely high wear tolerance due to waxy cuticle; high drought resistance via tubers; distinctive triangular stem (sedges have edges); highly invasive in garden beds and lawns.
Ecological Information
Introduced in many areas; tubers are edible (Tiger Nuts) and provide food for some wildlife (cranes and waterfowl); generally considered a problematic weed in ecological restoration.