SedgeHammer Herbicide

$9.88 - $105.72

Free Shipping!  Free Shipping!

  Size/Description Price/Ea. Qty  
SedgeHammer Herbicide pack(s) (13.5 grams)

Buy 1: $9.88 each

Buy 2 or more: $9.25 each

SedgeHammer Herbicide - 1.33 oz. bottle bottle(s) (1.33 oz.)

Buy 1: $87.95 each

Buy 2 or more: $87.45 each

SedgeHammer Herbicide - CASE (12 x 13.5 gram packs)SedgeHammer Herbicide - CASE (12 x 13.5 gram packs) CASE (12 x 13.5 gram packs)

Save! Get 12 for only $8.81 each

Total Price: $0.00

You May Also Need:

Chapin 1 Gallon Pump Sprayer (#20000) Chapin 1 Gallon Pump Sprayer (#20000)
Non-Ionic Surfactant for Herbicides Non-Ionic Surfactant for Herbicides

Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

SedgeHammer Herbicide


We highly recommend using a surfactant with Sedgehammer 1.33 ounce bottle. Sedgehammer in the 13.5 gram box already contains surfactant.
SedgeHammer herbicide kills nutsedge without injury to turfgrass, established ornamentals, shrubs, and/or trees. SedgeHammer provides post-emergence control of both purple nutsedge and yellow nutsedge. SedgeHammer also controls many broadleaf weeds and suppresses kyllinga. Nutsedge is controlled after emergence in cool and warm season turf grasses such as St. Augustinegrass, Bermudagrass, Kentucky Bluegrass, tall and fine fescue, and perennial ryegrass. Sedgehammer is considered one of the more "gentle to turfgrass" products and pets and people can return to the treated area once the spray dries.

Sedgehammer is the exact same product as Manage Herbicide. The Gowan Company purchased the Manage product and its rights to use from Monsanto in early 2005 and now sells the very same product as Sedgehammer.

Active Ingredient: * 1.33 oz bottle - Halosulfuron-methyl 75% * * 13.5 gram package Halosulfuron-methyl 5% *
Target pests: Purple Nutsedge, Yellow Nutsedge, Kyllinga
Application: Sedgehammer in the 13.5 gram packet already contains surfactant. Sedgehmmer in the 1.33 oz. bottle does not contain surfactant and should be used separately.
Yield: Mix 13.5 grams in 1 gallon of water. 1 mixed gallon of solution will cover 1000 sq. ft. One full bottle (1.33 oz.) makes approx. 40 gallons of finished solution. The 13.5 gram pack only makes 1 mixed gallon of solution.
Manufactured By: Gowan (UPC: 714654514980)

How SedgeHammer Herbicide Works

SedgeHammer is a water-soluble granule formulation that is mixed with water and applied to target plants with a sprayer. SedgeHammer is a member of the sulfonylurea family, an ALS (acetolactate) enzyme inhibiting herbicide. The active ingredient is absorbed into leaf tissue as quickly as 24 to 48 hours after application, then translocated through the plant’s vascular system. The herbicide quickly inhibits amino acids, halting cell division and plant growth in both roots and shoots, causing eventual death in target plants.

A nonionic surfactant is an additive that aids the penetration of SedgeHammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable the herbicide to “sheet” or spread across the surface of a plant or weed. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant.

SedgeHammer Target Weeds

Purple Nutsedge, Yellow Nutsedge, Kyllinga

WEEDS CONTROLLED WITH SEDGEHAMMER: Purple Nutsedge, Yellow Nutsedge, Green Kyllinga, Annual Kyllinga, Cocklebur, common Sunflower, common Ragweed, giant Ragweed, Pigweed, Velvetleaf, Horsetail

Additional weeds controlled with SEDGEHAMMER+ (small packets) only: Burcucumber (suppression), Corn Spurry, Rice Flatsedge, Philadelphia fleabane, Galinsoga, common groundsel (preemergent only), Jimsonweed (preemergent only), Kochia (suppression), Ladysthumb, common Lambsquarter (preemergent only), Venice Mallow (suppression), common Milkweed (suppression), honeyvine Millkweed (suppression), Morningglory (suppression), wild Mustard, redroot Pigweed, smooth Pigweed, common Poweweed, Purslane (preemergent suppression), wild Radish, Shepherds purse (suppression), Pennsylvania Smartweed

Target Uses of SedgeHammer

SedgeHammer Herbicide is a selective, post-emergent herbicide concentrate designed specifically to kill nutsedge and other broadleaf weeds without injury to turfgrasses, established ornamentals, shrubs, or trees. SedgeHammer can be used in both warm-season and cool-season turfgrasses, landscaped areas, and other non-crop areas.

SedgeHammer will not prevent germination of most labeled target weeds. Rather, it should be applied to actively growing weeds. If turfgrass or nutsedge is under stress, poor control may result. Also, desirable turfgrass, ornamentals, and trees should be well established before application. Do not apply to edible plants or gardens.

*Note that weeds can develop resistance to herbicides. To minimize the potential for resistance development and/or to control resistant weed biotypes, use a variety of cultural, mechanical, and chemical weed control tactics. Rotate with herbicides having other modes of action.

ACTIVE INGREDIENT: 1.33 oz. bottle - Halosulfuron-methyl 75%; 13.5 g package – Halosulfuron-methyl 5%

SedgeHammer Application Instructions

SedgeHammer is a powder concentrate to be diluted with water and applied with a pump sprayer. SedgeHammer should not be applied with hose-end sprayers since they are far less accurate than hand pump sprayers. When applying, spray the weeds thoroughly and wet the entire leaf surface of the undesirable plants. For best results, spray nutsedge after it has reached the 3 to 8 leaf stage of growth.

SedgeHammer often works with one application, but depending on the size and age of the nutsedge a second treatment may be required 6 to 10 weeks after the initial treatment. See “Other Tips” below for more information.

Mixing Instructions, 1.33 oz container:

Using included spoon, measure .9 grams (one spoonful) and pour into 1 gallon of water. Measure level scoops only (not rounded).

*Swirl or mix the solution thoroughly.  The 0.9 grams will cover 1000 sq. ft. One full bottle (1.33 oz.) makes approx. 40 gallons of finished solution.
*Add 2 teaspoons of a nonionic surfactant (spreader sticker) and swirl gently until mixed.

For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. Use only surfactants that contain at least 80 percent active material. Do not exceed the recommended amount of surfactant due to potential turf injury at higher rates.

*While spraying, periodically swirl or shake the mixture to keep the product evenly distributed in the water.
*Do not store the mixed solution as it will degrade and become ineffective.

The 13.5 gram packets already contain a surfactant, so you only need to mix the contents of the packet itself with a gallon of water. See below for further details. Always read the product label completely before use.

Each 13.5 g packet makes 1 gallon of finished solution and already contains a surfactant. Each 1.33 oz. bottle makes 40 gallons of finished solution. Each gallon of finished solution covers approximately 1,000 square feet. In high volume broadcast applications, each 1.33 oz. bottle covers 1-2 acres.

Standard Application Dilution rates / Mixing Ratios for SedgeHammer:

*13.5 g packet – Entire contents of 1 packet (0.5 oz.) per gallon of water – Ideal for spot treatments
*1.33 oz. bottle – Use 0.9 g (one spoonful) in 1-2 gallons of water with 2 teaspoons of a nonionic surfactant – More economical for broadcast applications

Broadcast applications (1.33 oz. bottle only):

*2/3 oz. in sufficient water for uniform application per acre – light infestations
*1 1/3 oz. in sufficient water for uniform application per acre – heavy infestations
*Do not exceed 4 applications per acre per season. Do not exceed 1 quart of surfactant per acre. Mix only what is needed at the time of application. Do not store unused solution.

SedgeHammer is for use in the following areas:

Commercial and residential turf and other non-crop sites including: airports, cemeteries, fallow areas, golf courses, landscaped areas, public recreation areas, residential property, roadsides, school grounds, sports fields, landscaped areas with established woody ornamentals, fairgrounds, race tracks, tennis courts, campgrounds, and rights-of-way

Tolerant Turfgrasses – Cool-Season: creeping Bentgrass, Kentucky Bluegrass, fine Fescue, tall Fescue, perennial Ryegrass; Warm-Season: Bahiagrass, Bermudagrass, Buffalograss (Sedgehammer+ only), Centipedegrass, Seashore pasapalum, St. Augustinegrass, Kikuyugrass, Zoysiagrass


SedgeHammer is not labeled for indoor use of any kind.


See general mixing instructions, mixing rates, and application details above.

Established woody ornamentals in landscaped areas – Apply as a post-directed spray. Avoid contact of this product to leaves of desirable plants since foliar injury, discoloration or death may result.

Horsetail Control – SedgeHammer + (small packets): Apply 1 oz. (27 g or 2 pouches) per 1,000 square feet after horsetail has leafed out. SedgeHammer (bottle): Apply 2 2/3 oz. per acre, or 1.8 g per 1,000 square feet.

This rate of product will control horsetail that is less than 6 inches tall and suppress horsetail that is greater than 6 inches tall. Herbicide symptoms are likely to show within 2 weeks as a necrotic ring at the base of the plant, even though the leaves and stems remain green and a deep leathery green in color.

SedgeHammer Features

  • May be tank mixed with Glyphosate herbicides in areas such as rights-of-way or fallow land.
  • Convenient pre-measured packets or scoop included with 1.33 oz. bottle.
  • Small (13.5 g) packets already contain surfactant.
  • Superior control of yellow and purples nutsedges.
  • People and pets may return to treatment area once spray is dry.
  • Labeled for use in a variety of warm and cool weather turfgrasses.

Extra Tips for Using SedgeHammer

  • For best results, do not mow turf for 2 days before or 2 days after application.
  • SedgeHammer is effective if no rainfall occurs within 3 hours, but best results are obtained with no rainfall or irrigation for at least 4 hours.
  • Use only in established turfgrass: allow turf to develop a good root system and uniform stand before application.
  • Results may take 5-7 days to begin to appear.
  • Do not apply when turfgrass or nutsedge is under stress.
  • Do not apply when temperatures exceed 85 degrees F.
  • Do not apply to golf course putting greens.
  • For transplanted woody ornamentals, allow 3 months after transplanting before applying this product.
  • When using in fallow areas, allow 4 weeks between application and transplanting of woody ornamentals or seeding or sodding of turfgrass.
  • SedgeHammer may remain active in the soil up to 3 years after application.
  • Store concentrate under cool, dry conditions.

Compare to: ProSedge Herbicide

Rating Snapshot

5 stars   115
4 stars   26
3 stars   5
2 stars   4
1 star   10

See all 160 reviews »

Average Customer Rating
4.5 star rating (160 reviews)

Write a Review

Sort By: 


Most Helpful Customer Reviews
  • 96 of 99 people found this review helpful:

    5 of 5 Stars  It works!
    By Charles on June 20, 2010

    I've been fighting nutsedge for several years using nutsedge and crabgrass control products. They were disgustingly ineffective. I read of other people's experience with SedgeHammer on a daylily web page and decided to try it. Two days after spraying, the nutsedge started turning brown. Of equal importance, the daylilies surrounding it did not. They show no evidence of ever being near an herbicide. Am I satisfied? You bet!

    Was this review helpful to you?  

  • 52 of 52 people found this review helpful:

    5 of 5 Stars  Sedgehammer
    By Gary on July 16, 2010

    I hate nut grass. It has been a problem for me from my first yard. I have used Roundup with an eye dropper and even a hypodermic syringe to kill the stuff. Then a man recommended SedgeHammer. The price was a little frightening but my resolve was firm. I bought it from, received it promptly and used it with great success. The yellow nut grass began dying in 3 days and now is gone. I don't know if it will remain "gone", but I have enough of the stuff to "kill" it repeatedly.

    Was this review helpful to you?  

  • 50 of 51 people found this review helpful:

    5 of 5 Stars  Sedgehammer - THE solution for nutsege
    By Len on September 2, 2010

    This hot, dry summer we've been having here in Tidewater, Virginia has been awful for the fescue we grow here but perfect for nutsedge. My infestation was extensive. A few tips: Follow all the advice given in the instructions. Make sure the nutsedge has almost a week of growth on it; this is important. If the sedge is too small or you try to use it on a freshly cut lawn, the sedge won't have enough surface area to absorb sufficient herbicide to be effective. Also, make sure you sure use surfactent with the hebicide, it will help this very expensive chemical be absorbed more effectively by the sedge. Give the chemical time to work; the longer you can wait before mowing after application (I waited almost a week before mowing) the better the killoff. By that time (a week after application) I had an almost 95% killoff, the few live sedges were those few I had missed on the first application. One more application on the stragglers will finish the job.

    Was this review helpful to you?  

  • 37 of 39 people found this review helpful:

    4 of 5 Stars  The Sedge Gets Hammered
    By Dennis on July 7, 2010

    I have been using this product for several years, and have found it to be the most effective for control of sedge, particularly in beds and around ornamentals in combination with Roundup. Because I am blessed with rich soil, everything grows well - sedge too; so control of sedge is an ongoing battle. The granular form of the product is convenient and easy to measure with the included measuring spoon.

    Was this review helpful to you?  

  • 32 of 33 people found this review helpful:

    5 of 5 Stars  SedgeHammer Works!
    By Angela on September 6, 2010

    Despite the fact that SedgeHammer is very expensive, I do not regret purchasing it because it WORKS! I bought the largest bottle which I think makes up to 40 gallons. So, I'll have enough to last me a few years. I recommend using an herbicide pump sprayer. I bought a Round-Up brand 2-gallon sprayer for $20 and it allows me to not waste as much SedgeHammer as I would if I used a watering can. I had A LOT of well-established sedge. About 7-10 days after the first application the sedge turned yellow and stopped growing and the grass was NOT harmed. I just did a second application because I had missed a lot sedge plants during the first application. This product is worth the $$.

    Was this review helpful to you?  

Most Recent Customer Reviews
  • 5 of 5 Stars  SedgeHammer Herbicide
    By Tom on September 20, 2014

    Considering that it take awhile for this product to fully work work I can only judge based on current progress. The biggest thing I've noticed is the plant has stooped growing. Normally after mowing the plant would grow up to two inches by the next day. It milliner out paces the turf growth. Also it has finally started turning yellow which I suspect is further evidence that it is working.

    Was this review helpful to you?  

  • 4 of 5 Stars  Sedgehammer Herbicide
    By Earl on September 20, 2014

    Overall, I'm very pleased with Sedgehammer. I had a pretty heavy infestation of sedgegrass in my tall fescue lawn, and the SH killed about 75% of it on the first application. I still have a little bit of the sedgegrass but will be doing the second application today, so hopefully the rest of this nasty stuff will be history soon.

    Was this review helpful to you?  

  • 4 of 5 Stars  sedgehammer works
    By Mike on September 18, 2014

    very expensive, but it works great. in two weeks the sedges turn brown and die off. did not harm the lawn either.

    Was this review helpful to you?  

  • 5 of 5 Stars  SedgeHammer
    By Desmond on September 17, 2014

    This product works very well in about 5 to 7 days and is very selective. It does not bother and grass area around it

    Was this review helpful to you?  

  • 5 of 5 Stars  SedgeHammer
    By David on September 17, 2014

    I love this product. it shown result after a week without watering my lawn. I also like to business with D.M.O.P.C. They carried good product and fast shipping, good support. Thank you all member.

    Was this review helpful to you?  

  • 1 of 5 Stars  Didn't work
    By Paul on September 13, 2014

    it's been 2 weeks and no reaction at all on the nuts hedge.

    Was this review helpful to you?  

  • 5 of 5 Stars  Worked Perfect
    By Rich on September 9, 2014

    Priced right, delivered Rocket quick and worked the first shot!! Better then I thought!

    Was this review helpful to you?  

  • 1 of 5 Stars  did not work
    By Michelle on September 6, 2014

    this product did not kill weeds. we put only 1/2 gal. water into sprayer, the weeds grew MORE. I have Kentucky Bluegrass lawn. there was some tall light green plants in the middle of it. Rutgers online weed gallery said it was RAGWEED and YELLOW NUTSEDGE. aggravates allergies. I am very disappointed with this product. at least it did not harm the lawn like Roundup would.

    Was this review helpful to you?  

  • 5 of 5 Stars  SeddgeHammer Herbicide
    By Geneva on September 1, 2014

    Veraay good if yaatou follow directions I waited two weeks and applied it again.

    Was this review helpful to you?  

  • 5 of 5 Stars  I Believe It Really Works!!!!!
    By Texas on August 28, 2014

    We've had a nutgrass problem for many years, severe for the last two. We've tried several chemicals, professional services, etc. with poor results. We applied SedgeHammer with a pump-up sprayer 10 days ago, mowed two days later and again today. We find NO nutgrass in our lawn. There are some blades showing in bare spots, but they are yellowing and wilting. For $18.50 we are almost 100% nutgrass free. We plan to apply again in early spring to be safe. DMOPC has been great--good products at a reasonable price and great service.

    Was this review helpful to you?  

See all 160 reviews »

Have a question about this product?
Ask our product experts...

Ask a Question

Sort By: 


Most Helpful Q&A's

April 16, 2011 Ken asked:

QAfter I mix 2 gallons of Sedgehammer, how long will it remain effective?
I have my nutsedge down to a small area with only a dozen colonies so I mix 2 gallons and fill a one quart spray bottle for convenience. How long will the remaining liquid product remain effective?

ATypically it is not recommended to leave any pesticide solution in a sprayer for more than two weeks at a time.  You should only mix what you plan on using.  If you want to leave the product in the sprayer for longer you should at least shake and agitate the sprayer every few days to keep the solution from separating.

32 of 32 people found this answer helpful.
Was this answer helpful to you?  

July 11, 2011 Laurence asked:

QWhat surfactant should I use with the Sedgehammer Herbicide?
Is there a preference as to which type? I noticed there are varying types, Non-Ionic, DyneAmic. Please advise as I plan to purchase ASAP. Thanks

AAll the surfactants on our website are non-ionic which is the type of surfactant the manufacturer of SedgeHammer herbicide recommends for use with their product in the bottle size (1.33 oz). The 13.5 gram pack of SedgeHammer already includes a built-in surfactant.

17 of 18 people found this answer helpful.
Was this answer helpful to you?  

June 26, 2011 Tee asked:

QDoes a measuring spoon come with the 1.33 oz bottle of Sedgehammer? If not, how would you measure .9 grams?

AYes, there is a measuring device in the box of the Sedgehammer 1.33 oz.

15 of 15 people found this answer helpful.
Was this answer helpful to you?  

February 10, 2013 Fred asked:

QHow long does Sedgehammer take to break down?
I had a bad infestation of nut grass in a garden bed which I have since sprayed. How long before I can safely use it as a vegetable garden?

AWe checked with the manufacturer on this one and they told us that the product can stay active in the soil for up to 3 years and a veggie garden should not be planted in this area for at least 3 years.

14 of 14 people found this answer helpful.
Was this answer helpful to you?  

April 27, 2011 Courtney asked:

QCan I use SedgeHammer to kill nutsedge right before sodding with St. Augustine?
I have bare soil (with nutsedge) right now and am planning to sod in the next 7-10 days. Or do I need to place the sod and then wait 4-6 weeks and go over it with the SedgeHammer?

APer the label on Sedgehammer, you are not supposed to reseed or sod within 3 to 4 weeks of using Sedgehammer.  Therefore you have only a couple of options.  One, is to treat the sedgehammer and stun it with a glyphosate (round up) type product which allows you to reseed within 7 days with no issues.  Or, you can treat with Sedgehammer and wait 3 to 4 weeks before re sodding.  If you must sod in 7 to 10 days, then you should treat the nutsedge with a glyphosate product and then you can treat with sedgehammer later if any new nutsedge makes it through the sod you are applying.

11 of 12 people found this answer helpful.
Was this answer helpful to you?  

Most Recent Customer Questions

May 28, 2014 Matthew from Corpus Christi, Texas asked:

QWhat product to use to kill a large Johnson grass infestation?

A Can you please tell us a little more information so we can accurately answer your question? What kind of area is the johnsongrass coming up in? Turf? Flowerbed? Garden? How much area are you trying to treat and are you wanting to do a broadcast application or a spot treatment? What state are you located in and are there any other grasses or weeds you are also trying to eliminate?

Was this answer helpful to you?  

May 16, 2014 Jerry from Burlington Nc asked:

QWhy can't I use Sedgehammer in a veggie garden?

A Sedgehammer is not labeled for the treatment per the manufacturer.

Was this answer helpful to you?  

May 14, 2014 Jorge from Houston, Tx asked:

QHow many gallons of water for 1.33 oz bottle of Sedgehammer?

A One full bottle of Sedgehammer (1.33 oz) will make 40 gallons of finished solution.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  

April 23, 2014 Gabriela from Brisbane asked:

QHow soon can I lay new turf after applying sedgehammer?

A To lay new turf, you want to wait at least 4 weeks after application of Sedgehammer.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  

April 20, 2014 Neal from Sherman Oaks, Ca asked:

QCan I safely use Sedgehammer on sedge in the ice plant?
Our rosea ice plant is infested with sedge. Will Sedgehammer kill our ice plant as well as the sedge? If "yes", is there a sedge-killing spray that will spare ice plant?


Sedgehammer is meant more for nutsedge control in turf grass.  For nutsedge in landscaped areas it is recommended to spot treat the sedge with a glyphosate or Round Up type product directly.  We recommend Roundup QuickPro 1.5 oz. packs for ease of use.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  

April 8, 2014 Buck from Lake City, Sc asked:

QWhat will kill artichoke plant in lawn and flower beds

A Bonide Grass Beater Over the Top should kill Artichoke plant in a flower bed. You can also use a glyphosate product like Round Up to spot treat around the flowers.We would also recommend contacting the Master Gardner in your area, for recommendations on which products are working in your area.

1 of 1 people found this answer helpful.
Was this answer helpful to you?  

March 6, 2014 Todd from Lewisville, Ar asked:

QCan you apply Sedgehammer to a garden spot that has not been planted yet?
And how long after applied can you plant peas and such?


We checked with the manufacturer of Sedgehammer on this one before and they told us that the product can stay active in the soil for up to 3 years and a veggie garden should not be planted in this area for at least 3 years

2 of 2 people found this answer helpful.
Was this answer helpful to you?  

November 14, 2013 Matt from West Palm Beach, Fl asked:

QCan Sedgehammer be mixed with another Herbicide to Control a Vast Variety of weeds?

A SedgeHammer Herbicide would not be recommended to be mixed with other herbicides. To be sure you can contact Gowan at 800-883-1844 for specific info. Also, review the product label as there is a long list of target weeds there.

3 of 3 people found this answer helpful.
Was this answer helpful to you?  

September 11, 2013 Anthony from Staten Island Ny. asked:

QI have a small area to spray can I use only a half a packet with the water/sedgehammer?

A We do not see why you could not break down the mixing ratio of Sedgehammer. However,this would be off label use, and  we do want to make sure you receive the best results, and we recommend speaking with Gowan  800-883-1844 for specific instructions.

3 of 3 people found this answer helpful.
Was this answer helpful to you?  

September 11, 2013 Galynda from Springfield Mo asked:

QCan I use SedgeHammer Herbicide on sod that is 2 months old?
We purchased a new home with new sod, when is a good time to use this product? We also have a sprinkler system if that matters, so how much water can be used?

A According to the product label, SedgeHammer Herbicide may be used on sodded turfgrass that is well established. Allow the turf to develop a good root system and uniform stand prior application. For best results, do not irrigate for at least 4 hours and do not apply through the irrigation system.

3 of 3 people found this answer helpful.
Was this answer helpful to you?  

See all 43 questions »

Purchase and Buy SedgeHammer Herbicide for sale now
with the best online lowest price and free shipping!

We only sell professional do it yourself pest control (diy), exterminator and extermination
pesticide, chemical and bug killer treatment products to spray, exterminate and eliminate pests.

These products are not available in stores such as Home Depot, Lowes, Walmart or Ace Hardware.
We accept VISA, MasterCard, American Express, Discover and PayPal Payments.