Cyperus esculentus
sedge weedUSDA zones 3–10Active: summerPerennial sedge that emerges in wet, warm conditions. Grows faster and taller than surrounding turf. Underground tubers (nutlets) make it extremely persistent.
V-shaped stem cross-section (sedges have edges); glossy, light yellow-green leaves; grows noticeably faster than turf; yellowish-brown flower spikelet.
Nutsedge thrives in wet soil. Improve drainage and reduce irrigation frequency.
When: Adjust irrigation throughout growing season
Pull when young before nutlets form. Pulling mature plants can scatter nutlets and worsen the problem.
When: Pull in late spring when plants are young, before June
Granulated sugar (1 lb/20 sq ft) may suppress nutsedge by feeding soil microbes that compete for nutrients.
When: Apply monthly during active growth season
Selective sedge killer. Very effective and safe for most turf types. Apply with non-ionic surfactant.
When: Apply when nutsedge is actively growing and 3-8 inches tall
Active ingredient: Halosulfuron-methyl — e.g. Sedgehammer, Prosedge
Alternative sedge control with longer residual activity. Works well as part of combination products.
When: Apply in late spring through summer when nutsedge is actively growing
Active ingredient: Sulfentrazone — e.g. Dismiss, Blindside
Grass safety: always match herbicides to your grass species — products safe on Kentucky bluegrass can kill St. Augustine or centipede. Lawn Guardian checks this automatically against your lawn profile.
Lawn Guardian turns this guidance into a schedule timed to your USDA zone and this week's actual weather — and adapts every time you log what you've done.
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