SedgeHammer Herbicide

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SedgeHammer Herbicide pack (13.5 grams)

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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.




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

Indoors

SedgeHammer is not labeled for indoor use of any kind.

Outdoors

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   260
4 stars   45
3 stars   13
2 stars   5
1 star   24

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Average Customer Rating
4.5 out of 5 stars (347)

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Most Helpful Customer Reviews
  • 164 of 170 people found this review helpful:

    5 of 5 stars  It works!
    By Charles in Bowling Green, Ohio on 06/20/2010

    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!

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  • 101 of 103 people found this review helpful:

    5 of 5 stars  Sedgehammer
    By Gary in Ozark, MO on 07/16/2010

    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 DoMyOwnPestControl.com, 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.

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  • 96 of 97 people found this review helpful:

    5 of 5 stars  Sedgehammer - THE solution for nutsege
    By Len in Carrollton, VA on 09/02/2010

    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.

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  • 70 of 73 people found this review helpful:

    5 of 5 stars  SedgeHammer Works!
    By Angela in Philadelphia, PA on 09/06/2010

    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 $$.

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  • 62 of 66 people found this review helpful:

    4 of 5 stars  The Sedge Gets Hammered
    By Dennis in Yorktown, VA on 07/07/2010

    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.

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Most Recent Customer Reviews
  • 5 of 5 stars  GREAT!
    By Brian in Toledo on 08/17/2017

    Sedgehammer Works absolutely like they said it would I put a second application on just for the heck of it to get rid of a product but it took about 4 days and they really started looking sick like brownish and I finally cut the grass and what's left of them doesn't look very healthy I don't expect it to come back I'm impressed and will be back. Good prices and reliable product

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  • 5 of 5 stars  Happy Horses!
    By Richard in Manchester on 08/15/2017

    We planted a new pasture and the Nutsedge took hold. Segehammer took it out when other products did not. Come spring the Horses will have new play area.

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  • 5 of 5 stars  It really wroks!
    By Dc in Long Island, NY on 08/14/2017

    I had a yellow sedge infestation all over my lawn. After just the first application of SedgeHammer, 90% of the sedge had died off. A second application to kill the remaining sedge was needed, and possibly a third as it can be easy to miss some when you have as much as I did. Now my lawn is 99% sedge free after only a month. It is important to follow the directions. The sedge leaf is what needs to be sprayed and the more leaf area you have the better the concentration. I would let my lawn grow for about 3-4 days and the sedge is about 2-3 times the height of the grass. Spray it and leave the lawn uncut for 3-4 more days to give the application time to work. Then cut the grass. About 5-7 days later all you will have are little yellow stumps that were the sedge and they break down in another week or two. I'm very pleased with the results.

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  • 5 of 5 stars  This Product works!
    By Ddm in NJ on 08/14/2017

    Tried eliminating this pest from garden using other products, etc.Recently tried "HAMMER". Sprayed a large petunia bed. It works. No harm to the petunias. The sedge seems to burn out at its base. I suspect that what is happening below ground is just as effective. Will know next year. Very satisfied and have recommended to others.

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  • 5 of 5 stars  SedgeHammer Herbicide
    By William in BRIDGEVILLE, DE on 08/12/2017

    This is a great product. I have been using it for a number of years and it gets the job done without harming the grass. I recommend it to all my neighbors.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Excellent product - THE answer to nutsedge
    By David in Fruitport, Michigan on 08/06/2017

    Having myself contributed to the development of this material years ago as an ag-chem herbicide, I already knew it was the best choice to control yellow nutsedge. So when we moved to our new home and found that the lawn, unfortunately, had an infestation of what is one of the world's worst weeds , I ordered SedgeHammer with confidence that it would work, and it did ... took out the entire weed crop of yellow nutsedge in my bluegrass lawn with one spray used as directed.

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  • 5 of 5 stars  Excellent treatment for problem
    By Steve in Long Isand NY on 08/05/2017

    I was amazed at how quickly this product worked

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  • 5 of 5 stars  Works Very Well! A+
    By Laura in Robinson, Texas on 08/04/2017

    I used Sedgehammer to control Yellow Nutgrass in an established lawn of Bermuda in central Texas. It takes a good two weeks to kill but I can tell it has taken a big hit on a majority of the grass. I plan to re-treat soon (within the three week mark) to get the ones left behind. It didn't hurt any of the bermuda. Make sure to use a non-ionic surfactant with it to get into the plant. And follow the watering rules listed on the label. I sprayed then mowed the yard a few days later, next round I will mow first then wait to spray to see if I get a quicker response.

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  • 5 of 5 stars  SedgeHammer Herbicide
    By Butch in Augusta Georgia on 08/03/2017

    Very EZ to mix and spray. Quick kill on Yellow Nut sedge with no affect on Bermuda grass.

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  • 5 of 5 stars  Bap! Pow!
    By Barry in Delaware on 08/02/2017

    Read the label, follow the instructions and watch you nutsedge be demolished in a few days!

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Most Helpful Q&A's

04/16/2011 Ken

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.

72 of 73 people found this answer helpful.
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08/12/2013 C from Baton Rouge, La

QI notice that you recommend that Sedgehammer not be applied when temps are over 85F.
Can it be safely applied in the early morning prior to the high afternoon temps to avoid damaging other plants?

AYou can safely apply Sedgehammer in the early morning to avoid damaging other plants, it is only during application do you want to avoid spraying when temps are above 85F

48 of 49 people found this answer helpful.
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07/11/2011 Laurence

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.

45 of 48 people found this answer helpful.
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02/10/2013 Fred

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.

44 of 45 people found this answer helpful.
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08/02/2013 George from Warminster Pa.

QWhen is the best time to apply Sledgehammer, before or after cutting your lawn?

AWe recommend to apply Sedgehammer two days after mowing your lawn. This will allow the weeds to be more open to absorbing the Sedghammer. You also want to wait at least 2 days before mowing your lawn after application.

36 of 36 people found this answer helpful.
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Most Recent Customer Questions

11/03/2016 Stan from Claremont

QDoes Sedgehammer kill the nuts?
Does Sedgehammer kill the nuts?

A

Sedgehammer Herbicide kills kyllinga, purple and yellow nutsedge. It will eliminate the entire weed. You may need to do more than one application. Be sure to wait at least three weeks between applications.

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10/27/2016 Renee from Napoleonville

QCan I still apply SedgeHammer Herbicide this late in the season?
I live in south Louisiana and have nut sedge actively growing. It was 84 degrees today (Oct 27th).

A

Temperatures can have an effect on the SedgeHammer Herbicide. As long as the nutsedge is still actively growing it can be applied. Colder temperatures can prohibit growth of weeds, but you should still get usage out of the product with those temperatures.†

1 of 1 people found this answer helpful.
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10/03/2016 Dan from Fort Worth, Tx

QCan I add food color to show coverage on the lawn when using SedgeHammer Herbicide?
Will colorant affect it?

A

You can use a spray indicator when applying herbicides like SedgeHammer Herbicide. We would recommend using a product that is specifically made for this use to ensure that it does not interfere with the efficacy of the herbicide. You can browse our Spray Indicators here.

1 of 1 people found this answer helpful.
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09/22/2016 Eugene

QWill SedgeHammer Herbicide harm established junipers?

A

SedgeHammer Herbicide††would not harm†your established junipers as it is considered a woody ornamental.†

1 of 1 people found this answer helpful.
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09/22/2016 Eugene

QWill SedgeHammer Herbicide stop any weed from germinating?

A

SedgeHammer Herbicide is considered a post-emergent,†therefore†the weeds need to be actively growing in order for this product to work successfully. Please let us know if we can be of any further assistance.†

1 of 2 people found this answer helpful.
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08/31/2016 Dan from Davenport, Ia

QCan you mix Sedgehammer and Momentum herbicide?

A

SedgeHammer Herbicide would not be recommended to be mixed with other herbicides.

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08/29/2016 Dennis from Concord, Nc

QWhat is the shelf life for SedgeHammer? Is this the best product for nutsedge control?

A

Yes, Sedgehammer is a great product for nutsedge! It has a 3 yr year shelf life from the date of purchase if stored away from extreme temperatures. If diluted, you will want to apply within 24 hrs of mixing for the most effective control.

3 of 4 people found this answer helpful.
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08/28/2016 Kathleen from Allen Park, Mi

QIs using a surfactant with SedgeHammer Herbicide necessary?
It works ok for me without it.

A

SedgeHammer Herbicide†packets do have surfactant in the packet already. You do want to use a surfactant if you are using the bottle.

1 of 2 people found this answer helpful.
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08/24/2016 Eileen from North Haledon, Nj

QHow long should I wait to water grass after application of SedgeHammer?

A

Best results are obtained with no rainfall or irrigation for at least 4 hours after application of SedgeHammer Herbicide.

1 of 1 people found this answer helpful.
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08/24/2016 Robert from Virginia

QHow long after treating with Sedgehammer Herbicide can I overseed my Bermudagrass/Fescue lawn with fescue seed?

A

According to the manufacturer, after applying Sedgehammer Herbcide it is recommended to wait 2 weeks to overseed on existing lawns and 4 weeks on bare ground lawns(dirt).

1 of 1 people found this answer helpful.
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