Sedgehammer Turf Herbicide

Sedgehammer is a selective herbicide for the control of nutsedge and other weeds in turfgrass and landscaped areas.

Controls yellow and purple nutsedge and certain tough broadleaf weeds like horsetail, as well as suppressing green kyllinga
Low use rate (1 1/3 oz/Acre or less) or .9 grams per 1000 square feet
Controls nutsedge by moving through the plant and affecting the underground growing points (rhizomes and tubers)
It controls nutsedge after emergence in cool and warm season turfgrass (including St. Augustinegrass, Bermudagrass, Kentucky bluegrass, tall and fine fescue, and perennial ryegrass)
Considered as one of the more “gentle to turfgrass” products
Pets and people can return to treated area once spray dries

Active ingredient: 75% Halosulfuron-methyl

Reviews

Customer Reviews

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Based on 15 reviews Average Rating 4.67 stars out of 5

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Rance Carter R. C. Rance C.
14-08-2025

Great purchase experience!

Everything arrived early and exactly as ordered!
Diane Merrill D. M. Diane M.
17-07-2025

Sledgehammer review

I just applied the first application and waiting to see the results. I will reapply if necessary. I have tried other products without any success. I hope this works!
John Bovender J. B. John B.
08-07-2025

Best nutsedge killer

This stuff works great. It does exactly what the directions say it will do.
Rubin B Williams R. B. W. Rubin B. W.
26-06-2025

Sledgehammer

It was delivered on time
Francoeur, Louis F. L. Francoeur, L.
22-06-2025

Poor customer service

Ordered product and after a week, it was still not shipped. Tried to call them several times, but they don’t answer their phone and don’t have voicemail. Very slow to respond to their email via their contact page. Stated that they finally shipped on Friday and that it’s on his way. We’ll wait and see what happens. Overall a very poor Company to work with concerning their communication.
Barbara Menzies B. M. Barbara M.
21-05-2025

I’ve used this product in the past and chose to get again as it works very well in controlling nursed and kylinna

see above
David PESQUIRA D. P. David P.
19-04-2025

Sedgehammer Turf Herbicide

Received but have not used just yet.
Randall Jones R. J. Randall J.
07-09-2024

Package Arrived

Package of sledgehammer arrived quickly and in perfect condition.
Patricia Allen P. A. Patricia A.
25-07-2024

Nutgrass...Sedgehammer

Sedgehammer Turf Herbicide is the only product that works on nutgrass. I have tried other products but they don't work...this works!
Steve Hardeman S. H. Steve H.
18-06-2024

Great product

I have used Sedgehammer for a while it has a short label but lives up to name. Seed world shipped fast and accurate will be back
Elizabeth Ricci E. R. Elizabeth R.
06-06-2024

Sedge killer

Great product, works slowly but gets the job done!
Ricardo Castellano R. C. Ricardo C.
31-05-2024

Good Quality Service

Got the product fast and in good shape
Nelson Kajioka N. K. Nelson K.
14-05-2024

Great Customer Experience

Easy to order and timely delivery. Also received thank you card expressing their appreciation and desire for 100% satisfaction. Tells me that they are committed to customer service. Will order again.
John Buchanan J. B. John B.
12-09-2023

Works Great

SeaWorld USA is the best place on the internet to buy products bar none