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Nutsedge Herbicide
Atticus Empero Nutsedge Killer Review
★★★★★ 4.6/5
our editor rating how we score4.4/5 from 1,167 shoppers at Amazon — their number, not ours.
$44–$54
Typical price · Spot treatment; 1.33 oz treats roughly 1 acre at label rate
Affiliate links — see our disclosure. Commissions never influence verdicts.
Standard herbicides don't touch nutsedge. Halosulfuron kills yellow and purple nutsedge down to the tuber without injuring turf.
Our Verdict
If the 'grass' in question grows twice as fast as everything around it and has a triangular stem, this is the only homeowner product that reliably ends it. One packet handles most infestations.
✅ Pros
- The homeowner standard for nutsedge — kills the tuber, not just the leaf
- Safe on all major US turf types
- No smell, tiny use rate
- Also controls kyllinga and some broadleaf stragglers
⚠️ Cons
- Slow: 2–3 weeks to full kill
- Needs a non-ionic surfactant (sold separately) for best results
- Reinfestations from deep tubers may need a second pass
Product type
Nutsedge Herbicide
Active ingredient
Halosulfuron-methyl 75% (water-dispersible granule)
Price range
$44–$54
Coverage
Spot treatment; 1.33 oz treats roughly 1 acre at label rate
Best for
Yellow and purple nutsedge outbreaks
our editor rating
4.6 out of 5
Where our facts come from
Label read on the registrant's own PDF
EPA Reg. No. 91234-31
We read the printed label published by the company that holds the registration. EPA hosts no PDF for this one, so this is the best available text.
What we found when we read it
Label read 2026-08-02: halosulfuron-methyl 75%, Group 2. Yellow nutsedge, purple nutsedge and Kyllinga spp. all named — this record's targets are label-supported. Label states heavy infestations require sequential applications. Our SLUG names SedgeHammer for legacy URL reasons; the label itself says 'Contains halosulfuron, the active ingredient used in SedgeHammer', so the slug is defensible rather than merely stale.
Where this page and the container disagree, the container wins — the label is the legal authority on rates and restrictions. How to read one yourself.
Where This Product Matters
Matched against each state's actual disease, weed and pest pressure.
Alabama
Alabama hub →Nutsedge
Application window: April–May and September, and check every label against centipede before it leaves the shelf
Arizona
Arizona hub →Purple nutsedge
Application window: March–May and during monsoon flushes; Celsius-type products handle 100°F+ windows
Arkansas
Arkansas hub →Nutsedge (Delta ground that stays wet)
Application window: Bounded by the label's temperature ceiling rather than the calendar — spring treatments finish before the June heat arrives, and nothing selective goes down again until September cools off
California
California hub →Nutsedge (yellow and purple)
Application window: March–May while weeds are young; avoid spraying drought-stressed turf in summer
Connecticut
Connecticut hub →Yellow nutsedge (the wet low corners of a till lawn)
Application window: Broadleaf sprays in May–June and again in September, when the weeds are moving sugars to the roots; skip July and August, when a stressed cool-season lawn takes the injury and the weed does not
Delaware
Delaware hub →Yellow nutsedge (the wet clay corners in the north and the irrigated sand in the south, for opposite reasons)
Application window: April to late May, then September into October. Skip July and August entirely: this is the transition zone, and a stressed tall fescue lawn takes the injury the weed shrugs off
Florida
Florida hub →Yellow & purple nutsedge
Application window: March–May and October–November; avoid applications above 85°F
Hawaii
Hawaii hub →Kyllinga and nutsedge in wet ground
Application window: Year-round where the turf is actively growing, which is most of the time; the constraint is heat and drought stress on the leeward side rather than a dormant season
Indiana
Indiana hub →Nutsedge (wet clay pockets)
Application window: October is the most effective month for broadleaf weeds; never apply above 80°F or to drought-stressed turf
Kansas
Kansas hub →Yellow nutsedge
Application window: April into May and again in September–October; avoid July and August, when a tall fescue lawn here is already at its limit
Louisiana
Louisiana hub →Nutsedge
Application window: March–May and October–November; avoid applications above 85°F and never on drought-stressed St. Augustine
Maryland
Maryland hub →Nutsedge (wet Coastal Plain ground)
Application window: April–May and September–October; autumn is the knockout window for the ground ivy and violet the Piedmont is full of
Mississippi
Mississippi hub →Nutsedge
Application window: April–May and September, avoiding the midsummer heat restrictions on most labels
Missouri
Missouri hub →Nutsedge (claypan ground that stays wet)
Application window: April–May and September–October; skip summer sprays on drought-stressed fescue
Nebraska
Nebraska hub →Yellow nutsedge in the irrigated low spots
Application window: Late spring and again from late August through September, when perennial broadleaf weeds are moving reserves to the root
New Jersey
New Jersey hub →Nutsedge (wet coastal-plain soils)
Application window: May and September–October; autumn is the knockout window for perennial broadleaf weeds
Rhode Island
Rhode Island hub →Yellow nutsedge (the wet hollows in till lawns)
Application window: Broadleaf work in May–June and again in September; the September pass is the one that holds, because the weed is moving reserves down
South Carolina
South Carolina hub →Nutsedge
Application window: April–May and September–October, and never above 90°F — centipedegrass is sensitive to 2,4-D both at spring green-up and in summer heat
Tennessee
Tennessee hub →Nutsedge
Application window: April–May and September–October; skip sprays on drought-stressed summer fescue
Texas
Texas hub →Nutsedge
Application window: April–early June and September–October; avoid herbicides above 90°F
Virginia
Virginia hub →Nutsedge
Application window: April–May and September–October; skip sprays on heat-stressed fescue in July and August
West Virginia
West Virginia hub →Yellow nutsedge in the wet spots the fragipan creates
Application window: April into May and again in September–October. Skip July and August: this is transition-zone country and a heat-stressed tall fescue lawn absorbs the injury the weed does not
Common questions
Common Questions
How much does Atticus Empero Nutsedge Killer cost?
Atticus Empero Nutsedge Killer typically runs $44–$54, covering Spot treatment; 1.33 oz treats roughly 1 acre at label rate.
What does Atticus Empero Nutsedge Killer treat?
Atticus Empero Nutsedge Killer targets Nutsedge, Yellow & purple nutsedge, Kyllinga.
What is the active ingredient in Atticus Empero Nutsedge Killer?
Halosulfuron-methyl 75% (water-dispersible granule), registered under EPA Reg. No. 91234-31.
What is the biggest downside of Atticus Empero Nutsedge Killer?
Slow: 2–3 weeks to full kill
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