SedgehammerNutsedgeKiller
SedgehammerNutsedgeKiller Sedgehammer Nutsedge Killer

Sedgehammer Nutsedge Killer

GOWAN

Sedgehammer Nutsedge Killer

Sedgehammer is a selective herbicide that provides excellent post-emergent control over yellow nutsedge, purple nutsedge, and other tough broadleaf weeds in lawns, turfgrass, and landscaped areas.

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Sedgehammer (also known as Sedgehammer Plus or Sedgehammer+), manufactured by Gowan, is a selective, post-emergent herbicide formulated with halosulfuron-methyl to control nutsedge and other broadleaf weeds. 

Sedgehammer comes in two different versions: Sedgehammer and Sedgehammer Plus.

Sedgehammer comes in a bottle and is used for treating large areas. It has a higher concentration of halosulfuron-methyl at 75%. It must be mixed with a surfactant. Sedgehammer Plus comes in pre-measured packets that are used for treating smaller areas. Each packet has a surfactant mixed in with the product and can treat 1,000 square feet. The amount of active in this version is 5% halosulfuron-methyl.

Both versions of Sedgehammer are safe weed killers for lawns. They are mixed in water to create a spray. When applied to the leafy tissue of targeted weeds, the solution moves down to the roots to eliminate the plant. Sedgehammer is ideal for use in residential, commercial, and industrial areas.

Tools Needed

A backpack sprayer, hand pump sprayer, or professional spray rig is needed to apply the Sedgehammer. For small-volume areas, we recommend using a hand pump sprayer.

If you are using the Segehammer Nutsedge Killer 1.3 oz, you will need to use a surfactant, such as Nanotek Surfactant.

How to Use

Applying Herbicide

  • Step 1: Determine how much Sedgehammer Nutsedge Killer or Sedgehammer Plus to use by measuring the square footage of the treatment area. You can do this by measuring the length and width of the treatment area and then multiplying them together (length X width = square footage). Spot treatments in turfgrass with Sedgehammer Nutsedge Killer 1.3 size, will use 0.9 grams of this product in 1-2 gallons of water per 1,000 sq. ft. Add 2 tsp (1/3 fl. oz.) of nonionic surfactant per gallon of water. Broadcast applications in turfgrass with Sedgehammer Nutsedge Killer 1.3 size, apply 2/3 to 1 1/3 oz. of product per 100 gallons of water per acre. Turfgrass applications with the Segehammer Plus 13.5 gram will use 1 of the 0.9 grams water-soluble bag of this product per 1-2 gallons of water per 1,000 sq. ft. You do not need to mix in a surfactant with Sedgehammer Plus.
  • Step 2: After measuring the amount of Sedgehammer you will need, you can create your solution. Fill your spray tank with half the amount of water, then add the measured amount of Sedgehammer Nutsedge Killer or the right amount of opened packets of the Sedgehammer Plus. If you are using the 1.3 bottle size then add the measured amount of non-ionic surfactant. Lastly, pour the remaining half of the water and stir or shake thoroughly for 2 minutes until the product contents and surfactant are completely dispersed.
  • Step 3: After diluting your Sedgehammer in water, apply your mixed solution. On a fan spray setting, spray the target weeds thoroughly until wet, but not to the point of runoff. A second treatment may be needed 6 to 10 weeks after your initial treatment. For best results, do not mow turf 2 days before or 2 days after application.

Where to Use

Sedgehammer Nutsedge Killer and Sedgehammer Plus can be applied to nutsedge and other weeds in established lawns, ornamental turfgrass, landscaped areas, commercial and residential turf and on other non-crop sites including airports, campgrounds, cemeteries, fairgrounds, fence rows, fallow areas, fuel storage areas, golf courses, landscaped areas, established woody ornamentals in landscape areas, lumberyards, public recreation areas, race tracks, residential property, rights-of-way, roadsides, school grounds, sod or turf seed farms, sports fields, tank farms and tennis courts.

Do not apply either of these products to golf course putting greens, and do not spray over the top of desirable flowers, ornamentals, vegetables, shrubs, trees, or vascular plants.

When to Use

Apply Sedgehammer Nutsedge Killer or Sedgehammer Plus when weeds are actively growing and have emerged from labeled sites.

These products can be applied when the turf has not been mowed for at least 2 days before application, and it should not be mowed 2 days after application. Do not use these products when rainfall is forecasted within 4 hours of application.

When controlling nutsedges, do not apply if either the turfgrass or nutsedges are under stress.

Safety Information

Sedgehammer Nutsedge Killer and Sedgehammer Plus are safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment when mixing and applying this product.

Keep people and pets out of treated areas until the spray solution has dried.

Special Considerations

Be aware of which version of Sedgehammer you are using. Only Sedgehammer Plus contains a non-ionic surfactant. If you are using the bottled version of Sedgehammer, you will need to mix the solution with a product like Nanotek Surfactant to ensure the solution sticks to the weeds you want to control.

Do not replant sunflowers until 18 months have passed after application. 

AvailabilityOnline
Restricted UseNo
Shipping Restrictions13.5 Gram: AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA
1.3 Ounce: AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA
BrandGOWAN
Keith's Pro Tips"Nutsedge has a root system made with tubers, also known as nutlets. Every time the roots system is broken, a new sprout appears. This means that when nutsedge weeds are pulled without the entire root system, more grows in its place, essentially causing the problem to get worse."
Product DrawbacksSedgehammer will damage vascular plants, such as ferns or tomato plants. When applying Sedgehammer be sure to avoid over spray on vascular plants by using a cone on the spray wand or covering non-targeted plants.
Target PestsAnnual Kylinga, Burcucumber, Cocklebur, Common Groundsel, Common Milkweed, Common Pokeweed, Common Ragweed, Common Sunflower, Corn Spurry, Galinsoga, Giant Ragweed, Green Kylinga, Honeyvine Milkweed, Ivyleaf Morningglory, Jimsonweed, Kochia, Ladysthumb, Lambsquarter, Pennsylvania Smartweed, Philadelphia Fleabane, Purple Nutsedge, Purslane, Redroot Pigweed, Rice Flatedge, Shepards Purse, Smooth Pigweed, Tall Morningglory, Velvetleaf, Venice Mallow, Wild Mustard, Wild Raddish, and Yellow Nutsedge
Application EquipmentBackpack Sprayer, Gloves, Pump Sprayer, Spray Rig
Application MethodsBroadcast Spray, Crack & Crevice, Spot Treatment
Active IngredientHalosulfuron-methyl 75.0%
Product TypeHerbicide
FormulationWater Dispersible Granule (WDG)
Application RateFor large volume applications, use between 0.6 and 1.3 fluid ounces per acre. The amount of water used will vary. For small volume applications, use 1 packet per gallon of water per 1,000 square feet.
Shelf LifeSedgehammer will last for up to 1 to 2 years when stored according to the product label. Store Sedgehammer in a cool, dry storage area.
YieldA 1-gallon mixture of Sedgehammer Plus will cover 1,000 square feet.
Use SitesOutdoors
Time to KillVisual results should be seen in 14 to 21 days. You may need to reapply 6 to 10 weeks after your initial treatment.
Comparable ProductsSedgemaster Herbicide
EPA Registration #81880-1-10163
4.8/5
Based on 46 reviews
  • 87%(40)
  • 4%(2)
  • 7%(3)
  • 2%(1)
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Extremely effective
This product works very effectively in a very short time. I had an extreme infestation of nutsedge all over my backyard where I have several small/young fruit trees and some vegetables. I was unable to use any general herbicide due to the risk of affecting the other plants. This guy don't play games when it comes to work professionally. It did the right work eliminating all sprayed nutsedges without damaging my trees and veggies. Depending on the size of the option you choose and the the grade of infestation, you might need a second application. The small packet 13.5 gr dilutes in 1 gallon. That's not enough if you have a serious infestation and most likely miss some random small nutsedge. But those you spray will die in less than a week and won't come back.
It works 100% in a short time without damaging good plantsThis product works very effectively in a very short time. I had an extreme infestation of nutsedge all over my backyard where I have several small/young fruit trees and some vegetables. I was unable to use any general herbicide due to the risk of affecting the other plants. This guy don't play games when it comes to work professionally. It did the right work eliminating all sprayed nutsedges without damaging my trees and veggies. You might need a second application if you have a serious infestation and most likely miss some random small nutsedge. But those you spray will die in less than a week and won't come back.
It only targets nutsedge. No other weeds are affected even if they are sprayed directly. It won't go after the nutsedge itself. You have to do find the sedge and spray it, meaning if you have a lot and miss some, you will need to manually UN-ROOT them or buy the Sedgehammer again.It works 100% in a short time without damaging good plants
100%
9/24/22
Warren Beacher
Verified Buyer
I have been using this for about 4 years now.

Pros: 1. One mix that does both sticking on weed and killing it
2. Only have to spray sedgeweed
3. Kills to root in 7 to 14 days
4. If you spray a little on to grass it doe not kill the grass

Cons: NONE
100%
7/25/22
William Sutton
Verified Buyer
Very happy first time customer
Packet mixes conveniently into 1 gal. solution. Killed all sprayed sedge with one application without affecting zoysia grass. Good company. Good product.
80%
5/5/22
William H.
Verified Buyer
Sedgehammer Nutsedge Killer
Sedgehammer Nutsedge killer is the only herbicide that I have had good results with in killing nutsedge. I have some spotty outbreaks and some heavier patches in our lawn. I try to control nutsedge in a two acre lawn area that also includes some beds and quite a few trees. I use a backpack sprayer because it does not consistently grow in all areas. It has not harmed anything but the nutsedge.
100%
9/28/21
Jeff L.
Verified Buyer
I found solutionsstores.com on line as I was looking fir and pricing Sledgehammer to kill my sedge weed. I found them to be excellent on price and quick delivery. I will definitely use them again!
100%
9/15/21
Charlotte S.
Verified Buyer
Follow instructions and expectations will be met. The ease of mixing and applying is great.
100%
9/12/21
Teresa P.
Verified Buyer
Gets rid of nutsedge fast
I love it. It’s quick to get rid of nutsedge. I gave some to my neighbor hoping she would use it too.
100%
9/11/21
Susan Taylor
Verified Buyer
Great product
I definitely would recommend this product. Some nut grass I had to spray twice probably because I didn’t saturate the weed enough. This was used in gardens so I’m working around plants but I’m only having a few weeds return. I was getting overrun with them before.
100%
9/3/21
Daniel S.
Verified Buyer
Your product is easy to use and it does a great job of controlling the weed I am trying to control.
100%
8/31/21
Clark Lewis Jr
Verified Buyer
Kyllinga weed is getter weaker
After one spray application Kyllinga has stopped growing and is no longer producing seed heads. Second application should knock it out.
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More Information
Restricted Use No
Shipping Restrictions AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA
Availability Online
Signal Word CAUTION
Keith's Pro Tip "Nutsedge has a root system made with tubers, also known as nutlets. Every time the roots system is broken, a new sprout appears. This means that when nutsedge weeds are pulled without the entire root system, more grows in its place, essentially causing the problem to get worse."
Target Pests Multi Burcucumber, Cocklebur, Common Groundsel, Common Milkweed, Common Pokeweed, Common Ragweed, Common Sunflower, Corn Spurry, Fleabane, Galinsoga, Giant Ragweed, Green Kylinga, Honeyvine_Milkweed, Ivyleaf Morningglory, Jimsonweed, Kochia, Ladysthumb, Lambsquarters, Pennsylvania Smartweed, Purple Nutsedge, Purslane, Redroot Pigweed, Rice Flatsedge, Shepherdspurse, Smooth Pigweed, Tall Morningglory, Velvetleaf, Venice Mallow, Wild Mustard, Wild Radish, Yellow_Nutsedge
Time to Kill Visual results should be seen in 14 to 21 days. You may need to reapply 6 to 10 weeks after your initial treatment.
Chemical Type Herbicide
Formulation Water Dispersible Granule (WDG)
Application Methods Broadcast Spray, Crack & Crevice, Spot Treatment
Product Drawbacks Sedgehammer will damage vascular plants, such as ferns or tomato plants. When applying Sedgehammer be sure to avoid over spray on vascular plants by using a cone on the spray wand or covering non-targeted plants.
Active Ingredient Halosulfuron-methyl 75.0%
Application Equipment Backpack Sprayer, Gloves, Pump Sprayer, Spray Rig
Mix Rate For large volume applications, use between 0.6 and 1.3 fluid ounces per acre. The amount of water used will vary. For small volume applications, use 1 packet per gallon of water per 1,000 square feet.
Low Use Rate 0.032 oz./1,000 sq. ft.
High Use Rate 0.060 oz./1,000 sq. ft.
Use Sites Outdoors
Yield A 1-gallon mixture of Sedgehammer Plus will cover 1,000 square feet.
EPA Registration No. 81880-1-10163
Shelf Life Sedgehammer will last for up to 1 to 2 years when stored according to the product label. Store Sedgehammer in a cool, dry storage area.
Comparable Products Sedgemaster Herbicide
Children or pets? No
Property Characteristics None
Questions and Answers
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  1. Q:Can you plant sunflowers after spraying sedgehammer?
    5/16/24
    A:No, sunflowers can only be replanted when 18 months have passed after applying Sedgehammer Nutsedge.

    Amanda

    5/16/24
  2. Q:Does sedgehammer work on horsetail?
    4/28/24
    A:Yes, Sedgehammer Nutsedge will control horsetail that is less than 6 inches tall and suppress horsetail that is greater than 6 inches tall.

    Amanda

    4/29/24
  3. Q:Is Sedgehammer safe to use on carpet grass?
    6/5/23
    A:I believe this product is specific to control nutsedge, to be absolutely sure test on a small area first. The product is not completely effective, the only way I stopped nutsedge was to dig up the nuts with a pitch fork.

    Russell Krafft

    6/5/23
    Certified Buyer
  4. Q:how many ounces to a gallon?
    8/6/22
    A:Sedgehammer Nutsedge Killer will is Mixed 0.9 grams of the water-dispersible granules with 1 to 2 gallons of water. Mix (1) 0.9 gram water soluble packet with 1 to 2 gallons of water. For more specific application rates please refer to the label. https://www.solutionsstores.com/sedgehammer-nutsedge-killer

    MARK RIVERA

    8/13/19
    Certified Buyer
  5. Q:Can this product be applied in combination with Lesco Three Way herbicide?
    7/30/22
    A:Sedgehammer Nutsedge Killer can be tank mixed with Glyphosate herbicide for application as a directed spray in landscaped or fallow areas. Tank mix with Glyphosate herbicide in landscape and fallow areas and turf renovation. Do not exceed the specified amount of surfactant due to the potential for turf injury at higher rates.

    Amanda Chavez

    8/1/22
    Certified Buyer
  6. Q:How many times can I spray for a year?
    10/23/21
    A:No more than 4 applications can be made per year. Do not exceed 5 1/3 oz. by weight of this product (0.25 lb active ingredient) per acre per 12 month period.

    Amanda Chavez

    10/25/21
    Certified Buyer
  7. Q:Can this be used on Bermuda grass?
    10/5/21
    A:Yes, use at less than 85 degrees and it shouldn't stress the grass too much.

    Shawn Gearinger

    10/6/21
    Certified Buyer
  8. Q:How can I find out the sqft I’ll need to apply to the areas and do you spay once and walk away?
    9/11/21
    A:Easiest way is to use a lufkin 12” measuring wheel to determine the square footage. I love my measuring wheel and it’s worth the investment if u do a lot of landscaping/pesticide U can also use google maps for large areas to get an approximate.

    Nancy

    7/5/24
  9. Q:How much powder to make 32 oz solution?
    8/6/21
    A:Although I have just used the entire pouch in one gallon and used the entire mixture, you would just use one quarter of the contents of the pouch for just 32 ounces. I don't know about you but I do not have a scale to measure just one quarter of the contents of 0.5 ounces or 0.125 ounces (0.5 divided by 4=0.125 ounces. If it was me I would just pour the entire contents of the pouch on a clean sheet of white paper then cut the contents into 2 equal piles as close as I could and then cut each of the halves in half again leaving you with 4---0.125 ounces of powder to be used in 32 ounces of water. Hope this helps, good luck.

    Dewey Benedetti

    8/8/21
    Certified Buyer
  10. Q:Can Sedgehammer be combined with other herbicides, I'm using MSM Turf and Quinclorac 75. Will those 3 herbicides mix well together?
    7/29/21
    A:Yes, u can mix herbicides together. This sedgehammer needs to have a surfactant/adjuvant like methylated seed oil added to it. Make sure the additional herbicides also need an adjuvant. Otherwise u can do damage to ur lawn. U can also do a jar test with any mixture of herbicide to make sure they will mix correctly in ur sprayer

    Nancy

    7/12/24
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