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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) in 1 to 2 gallons of water per 1,000 sq. ft.
* Use a Surfactant to Increase Effectiveness
* See label for complete application instructions
Sedgehammer in the 13.5 gram packet Contains Surfactant
Sedgehmmer in the 1.33 oz. bottle Does Not Contain Surfactant and should be used
|Yield:||Mix 13.5 grams in 1-2 gallons of water to 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 finished application of solution.|
|Formulation:||Professional Product (1.33. bottle)|
|Shipping Weight:||0.06 lbs|
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 297 reviews »
142 of 147 people found this review helpful:
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!
88 of 90 people found this review helpful:
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.
80 of 81 people found this review helpful:
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.
59 of 62 people found this review helpful:
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 $$.
57 of 60 people found this review helpful:
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.
By R. in Lexington, SC on 02/09/2017
SedgeHammer is not fast acting, but proficient in killing sedge. Be patient and wait at least 2 weeks before applying another application. You will notice a small amount of yellowing of the sedge after about a week.
By Bill in Blackshear, Georgia on 02/08/2017
I have Daylily beds around our home and there was one that was being covered in Nut grass. I tried several things, which included round-up, but without success. I didn't think there was anything that would kill the nut grass until I purchased a package of Sedgehammer. I thought that it was not going to work either. It took about 3 weeks before I began to see the grass start to turn brown and dry up. It does not hurt the daylilies if the spray gets on them. There were places that I had missed, so I ordered two more packages, however, the weather has not yet permitted me to spray the grass that I missed. I would recommend this for spraying nut grass.
Not Sure About This Product
By John in Merritt Island,FL on 02/04/2017
I have tried this in a few areas and the sedge has popped up again. I need to order more, I guess. Overall, I guess it is the same as Image but I was hoping for better results.
Thank you for your comments! It can be easy to miss nutsedge in grass that is mowed regularly, so it is not uncommon to need multiple applications to get all the nutsedge in the yard, especially if you are only spot treating. Sedgehammer will need about 28 days to kill the treated nutsedge plants. Please let us know if we can further assist you!
Wow! It Works
By Mike in Fort Lauderdale, FL on 01/26/2017
I had several spots where my St Augustine was being taken over by the sedge grass. I bought the small quantity not trusting that it would work. You have to be patient because it takes time. The area I sprayed now has healthy St, Augustine, but the sedge grass is dead. This product really works great.
Do my own gardening
By Morris in Austin, Texas on 11/25/2016
No go sprayed three times see nothing
By Johnny in Howey in the hills, fl on 11/13/2016
I applied sedgehammer to my lawn one month ago i see no results so i am going to spray again and see if it will work i am not happy yet . Johnny
By Mel in Elgin on 11/06/2016
SedgeHammer works wonders on the aggressive nutsedge weed. I recently purchased an existing home where most of the lawn was covered with nutsedge and other weeds. I wanted to plant grass seed as soon as possible so I dug the weeds manually. I found that nutsedge have roots reaching down as deep as 18 inches. I attempted to remove all of the foliage, roots and any nuts attached to the weed. After planting the grass seed I noticed the return of some of the nutsedge. It multiplied like crazy. I waited several weeks for the new grass to mature and instead of spraying the Sedgehammer (afraid of killing the new seed), I gathered each plant at the base, sprayed the herbicide between my gloved fingers and pulled the liquid upward to the top of the foliage. Within 6-7 days the foliage on the nutsedge turned yellow. It was recommended that the herbicide not be applied until after new grass had been moved several times. Because the weed was multiplying so rapidly, I chose to individually treat each plant. I have noticed no damage to the new grass. I am very impressed with Sedgehammer. It works as described and is much easier than individually pulling or digging the weed.
By Pam in South Daytona, FL on 11/04/2016
Expensive, but worth it. Easy to use. My yard is spotted with yellow and purple nutsedge, but kyllinga is everywhere. Will take several apps to complete but, so far, so good. Received great advice and encouragement when I called to ask if Dawn could be used.
By Jj in Las Vegas on 10/28/2016
Uncertain as I will over-seed this fall, taker care of bare spots and make an application of SedgeHammer this spring and a second in late spring as by the end of May temps are reaching triple digits.
By Vickey in Louisville on 10/28/2016
A lot of products work to a degree but this product works hands down better. When you don't have the time to re-apply do it once and be done. It's very cost effective as well.
Have a question about this product?
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Ask a Question
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.
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.
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.
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
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.
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.
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.
QWill SedgeHammer Herbicide harm established junipers?
A SedgeHammer Herbicide††would not harm†your established junipers as it is considered a woody ornamental.†
SedgeHammer Herbicide††would not harm†your established junipers as it is considered a woody ornamental.†
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.†
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.†
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.
†SedgeHammer Herbicide would not be recommended to be mixed with other herbicides.
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.
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.
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.
SedgeHammer Herbicide†packets do have surfactant in the packet already. You do want to use a surfactant if you are using the bottle.
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.
Best results are obtained with no rainfall or irrigation for at least 4 hours after application of SedgeHammer Herbicide.
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).
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).
08/18/2016 Steve from Saint Joseph, Il
QDoes indicator dye inhibit efficacy of SedgeHammer Herbicide?
I would like to use this product as a spot spray. Indicator dye would make it easier to prevent missing and/or over application. However, I don't want to use it if it will interfere with efficacy.
A SedgeHammer Herbicide†will not effected by using a spray indicator with it. A spray indicator does ensure you have even herbicide application and that you do not miss places where you may need to treat.
SedgeHammer Herbicide†will not effected by using a spray indicator with it. A spray indicator does ensure you have even herbicide application and that you do not miss places where you may need to treat.
08/16/2016 Michael from Lyman, Sc
QIs Sedgehammer Herbicide the best to apply in a Bermuda lawn for nutsedge?
A Yes, Sedgehammer can be applied to Bermuda lawns for†nutsedge. The 13.5 gram pack will cover about 1,000 sq ft if mixed with a gallon of water. The 1.33 oz bottle should be applied with a surfactant as the pack already includes a surfactant and will cover up to an acre of treated area.†
Yes, Sedgehammer can be applied to Bermuda lawns for†nutsedge. The 13.5 gram pack will cover about 1,000 sq ft if mixed with a gallon of water. The 1.33 oz bottle should be applied with a surfactant as the pack already includes a surfactant and will cover up to an acre of treated area.†