Yellow Nutsedge (Grass-like Sedge)
Cyperus esculentus · Warm-season perennial; C4 photosynthesis (Not a true grass, but a monocot sedge)
Grass Family
Cyperaceae (Sedge Family)
Grass Category
Invasive/Weed Grass (often found in lawns and ornamental beds)
Variety / Cultivar
Common wild type (often regarded as a weed in managed turf)
Hardiness Zones
USDA Zones 3-11; very cold hardy tubers that overwinter underground, emerging in late spring as temperatures rise.
About This Grass
An erect, grass-like plant with a distinctive triangular stem (sedges have edges). It is lighter green/yellow-green than surrounding turf, growing significantly faster than common lawn grasses in hot weather. It reaches 6-30 inches if left unmowed.
Blade Characteristics
Blades are 3-10mm wide, V-shaped or channeled in cross-section, with a prominent midrib. Leaves are arranged in groups of three (3-ranked) from the base. Tips are long and tapered to a sharp point. Texture is waxy and smooth.
Root System
Fibrous roots accompanied by a complex network of rhizomes that produce starchy tubers (nutlets) at the tips. Tubers allow for rapid re-emergence after manual pulling.
Growing Information
Origin Region
Native to North America, Europe, and much of the Old World tropics; well-adapted to temperate and tropical regions worldwide
Growth Habit
Rhizomatous and tuber-forming (nutlets); spreads rapidly via underground stolons and small tubers
Sunlight & Water Needs
Full sun to partial shade; prefers wet or poorly drained soils but is highly drought-tolerant once established due to tubers.
Mowing & Maintenance
Hard to control with mowing as it grows faster than turf. Recommended height: N/A (invasive). Maintenance involves targeted herbicides (Sedgehammer) rather than cultural care.
Special Characteristics
Distinguished by its triangular stem; highly resistant to most standard broadleaf and grass-selective herbicides; extremely high regrowth potential from tubers.
Ecological Information
Introduced/Naturalized; tubers are a food source for some wildlife (waterfowl and hogs). In landscapes, it is considered an aggressive weed that outcompetes native flora and turf in moist areas.