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.
- 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 148 reviews »
90 of 93 people found this review helpful:
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!
49 of 49 people found this review helpful:
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 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.
49 of 50 people found this review helpful:
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.
36 of 38 people found this review helpful:
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.
31 of 32 people found this review helpful:
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 $$.
1 of 1 people found this review helpful:
By Steve on July 29, 2014
Does just what was promised: kills the Yellow Nut Sedge and does not kill the grass. It does take 7 to 10 days before you know if it is working; the nut sedge turns yellow and leaves die off.
SedgeHammer clobbers Nutsedge
By Melissa on July 28, 2014
I have tried many sprays to kill the Nutsedge in our St. Auguststine. I have finally found something that immediately takes the bite out of this awful weed. The packets are perfect because the surfactant is already included. Would highly recommend !!
1 of 1 people found this review helpful:
By G.s. on July 21, 2014
I applied it once. Sedge turned brown and died. Zoysia sod was not damaged. Cut the grass. Sedge did not return. Wow. I have a little on the other side of the driveway; I will treat it next.
1 of 1 people found this review helpful:
EASY and it WORKS!
By C. on July 20, 2014
Had a bid from a local lawn care service, which said I have Nutsedge grass problem. His price to solve was too expensive and I had to commit to 6 months of service. Got on the website (I have purchased from this company before) and found this product. I like the fact that it does not require you to buy a surfactant to mix with it. Its already in it! Just mixed the powder with a gallon of water in your sprayer and you are good to go! Easy easy easy! I used 2 gallons on my front yard and now all I see is bermuda grass -- NO Nutsedge. It stopped the Nutsedge growth immediately, and now it is gradually dying out. I just purchased 3 more for my back and side yards.
By Kevin on July 18, 2014
Sedgehammer is fast actting product good service for getting fast shipping will buy again
1 of 1 people found this review helpful:
By Eric on July 18, 2014
This product is a slow kill and does take up to ten days before I noticed the nutsedge turning brown.
By Paul on July 17, 2014
Excellent product. After application it killed the problem weed in 8 days.
1 of 1 people found this review helpful:
By Skip on July 10, 2014
SedgeHammer is a terrific product. I have used other products such as ProSedge, and found SedgeHammer consistently delivered a far superior result.
2 of 2 people found this review helpful:
By Mac on June 26, 2014
As anyone with purple and yellow nutsedge knows, these plants are extremely invasive and tough to control. But SedgeHammer really works. It kills the sedge but (in my yard) didn't hurt the fescue grass around it. In three years I've not been able to completely eradicate it, but every year I see less and less. It's definitely good to have at least one extra packet on-hand. Highly Recommended.
1 of 1 people found this review helpful:
By Gary on June 25, 2014
Expensive but does the job. Only thing I've found to really control nut grass.
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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.
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.
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?
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.
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?
November 14, 2013
Matt from West Palm Beach, Fl asked:
QCan Sedgehammer be mixed with another Herbicide to Control a Vast Variety of weeds?
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.
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.
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?
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.
September 10, 2013
Byron from Sarasota, Fl asked:
QI purchased a 1.3 oz. bottle of sedgehammer, how many spoons to put in one gallon water
A You want to mix one spoonful Sedgehammer into one gallon water.
August 26, 2013
Nolberto from Delano, Ca asked:
QHow soon before and after applying Sedgehammer herbicide can I water my lawn?
August 12, 2013
C from Baton Rouge, La asked:
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?
A You 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