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|
|For use in:||Turfgrass, Landscaped areas, and other non-crop areas |
* See label for complete list
|Application:||0.5 oz. (13.5 grams) per gallon of water per 1,000 sq. ft. |
* See label for complete application instructions
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.|
|Formulation:||Professional Product (1.33. bottle)|
|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.
- 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
See all 189 reviews »
110 of 114 people found this review helpful:
By Charles in Bowling Green, Ohio 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!
59 of 60 people found this review helpful:
By Gary in Ozark, MO 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 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.
55 of 56 people found this review helpful:
Sedgehammer - THE solution for nutsege
By Len in Carrollton, VA 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.
41 of 44 people found this review helpful:
The Sedge Gets Hammered
By Dennis in Yorktown, VA 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.
35 of 36 people found this review helpful:
By Angela in Philadelphia, PA 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 $$.
1 of 1 people found this review helpful:
The Best Post Emergent I have Ever Used
By Devin in Houston, TX on August 26, 2015
Worked as advertised. Throw packet into a gallon of water, put into sprayer and hit the Nutsedge. In two days it started to flatten out and in five days it went limp. Now it's all yellow and becoming compost. It didn't hurt the Bermuda or St Augusine either. I wish all chemicals worked this good for landscaping work!!
Central Missouri Master Gardener
By Peggy in Jefferson City, MO on August 26, 2015
Product performed as promised and killed only sedge and not lawn. Price was best I've found for same product.
Sedge Hammer Herbicide
By Al in Loudon, TN on August 25, 2015
This tuff is goooood. I applied it to all the Nut Sedge grass and it killed in in just about 7 days. If the label is correct I should be rid of this pest for a couple of years. Great product.
By Ruralsurgeon in Southern Illinois on August 25, 2015
Sedgehammer wiped out every stalk of Nutsedge in our yard with one application. I will use it again if necessary. I do not yet know what effect it will have on next year's crop of Nutsedge, but I expect to have less Nutsedge.
By New in Florida on August 22, 2015
We had a lot of sedgeHammer throughout our yard. Following the directions carefully, I sprayed and most of it died within a week or so. We still have a very small amount which I will retreat. Our lawn looks so much better!! Love this product!
Goodby water grass
By Ralph in Edwardsville, il on August 19, 2015
This stuff gets rid of sedge. Takes 10-12 days but it does the job.
SedgeHammer Burned My Lawn
By Warren in Fenton, Missouri on August 14, 2015
I applied SedgeHammer exactly as directed and this stuff killed the grass everywhere I sprayed. The nutsedge is gone, but now, I have a yard full of brown spots where the nutsedge was. Very disappointed, will never use again.
SedgeHammer + Really Works
By Josh in East Providence, RI on August 13, 2015
I was skeptical, since I previously purchased Certainty and did not have much luck with it. However, my nutsedge issue is practically out of control so I needed to try something. I went with Sedgehammer+ after reading the reviews and I am really satisfied with how it worked. I sprayed the backyard 2+ weeks ago and noticed the sedge begin to yellow after a couple of days. I waited a solid week to mow and after I did, I noticed that the areas I sprayed were not growing at that segde rate and are continuing to yellow and die off. I'm hoping that this product will permanently kill off this horrible weed. Now I just need to stay on top of it in the future and with this product I know I can!
By Bob in Olney, MD on August 13, 2015
The herbicide SedgeHammer worked well. It was easy to mix the powder with water and spray on the sedge plant. Within 10 days the plants were yellow and dying.
By Larry in houston,tx on August 12, 2015
Don't be in a hurry to see it start turning the nut grass yellow and dying. It took about 2 weeks to die off. Very happy with it. I am a repeat user.
Have a question about this product?
Ask our product experts...
Ask a Question
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.
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.
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.
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.
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.
July 22, 2015
Renee from Dover asked:
QCan Sedgehammer be used when other weed applications are being put on the lawn, or will it harm the lawn?
Our lawn is being sprayed 4 times a year by a professional lawn company, but they do not spray for nutgrass.
You should be fine to spot treat the nutsedge using Sedgehammer as long as the lawn is not over-stressed by heat or drought or from the other herbicide being applied. Be sure to apply according to the product label.
You should be fine to spot treat the nutsedge using Sedgehammer as long as the lawn is not over-stressed by heat or drought or from the other herbicide being applied. Be sure to apply according to the product label.
June 27, 2015
Moises from Orlando, Fl asked:
QCan I use SedgeHammer on my Bahia Lawn?
A SedgeHammer Herbicide is safe to use on established Bahia grass.
June 25, 2015
Jim from Richmond Hill, Ga asked:
QUsing SedgeHammer on feed plots
I have several feed plots we use for deer and turkey. Yellow nutsedge has taken over all. I'm planning on spraying several acres using the 1.33 oz. bottle with 40 gallons of water. How many acres will this cover and will it hurt deer to graze the rye, oats and wheat we plant in the fall? Thanks, Jim
A No, Sedgehammer Herbicide is not labeled to be used around any feed plots.
June 24, 2015
David from Lubbock asked:
QWill sedgehammer hurt yucca
A SedgeHammer Herbicide could harm Yucca, we do not recommend to apply near Yucca. You may want to consider spot treating with a product like Roundup.
June 22, 2015
Tony from 40 Miles South East Of Hoston Texas asked:
QWill Sedge Hammer kill Cyperus Entrerianus (Rice Sedge)
I have 12 acres that is covered with rice Sedge and grass. I don't want to round up the whole pasture unless I have to, beings how rice sedge is close relation to nut sedge will Sedge Hammer kill it?
A Sedgehammer is labeled for purple nutsedge, yellow nutsedge and kyllinga. It is not labeled for rice sedge. We would recommend getting a proper identification of the weeds in your pasture.
June 4, 2015
Lindak. from Kill Devil Hills, Nc asked:
QHow soon is it safe to plant new perennials?
I have a perennial garden that sprouted nutsedge. I sprayed the area about three weeks ago, and the weed is nearly dead, but still slightly yellow. When will it be safe to plant my new perennials? Should I assume that my new milkweed plants should not be planted in the bed?
A You can plant new perinnials at least 4-6 week after SedgeHammer Herbicide application.
May 28, 2015
Renee from Tallahassee asked:
QCan I use Sedgehammer in flower bed? How far can I use it away from my veggie bed?
A No, Sedgehammer Herbicide is not labeled to be used over desirable flowers. The product should be kept out of the drip line of any edibles.
May 8, 2015
Jeffery from Deridder, La asked:
QWhat can be used to control nuts edge in a growing/active vegetable
I have bad stand of nuts edge in my vegetable garden. What can be used to control it among my growing vegetables?
A The only way to treat for sedges in a veggie garden is to hand weed or spot treat. You could spot treat with Round up.
April 17, 2015
Billy from Colt, Ar asked:
QHow long must sedgehammer be applied before being affected by rain
A Sedghammer will be rainfast 4 hours after application.
March 26, 2015
Cindy from Rancho Santa Fe Ca asked:
QWhen applying Sedgehammer would it be better to water the area before applying?
There is no need to water before applying SedgeHammer, just make sure you getting good coverage on the sedge you are trying to treat while applying.