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Gowan USA 51496 SedgeHammer, 13.5g - 5oz, White

4.4 4.4 out of 5 stars 3,207 ratings

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Sedge Hammer

Purchase options and add-ons

Brand Monterey
Item Weight 13.61 Grams
Liquid Volume 1 Gallons
Item Form Spray
Active Ingredients Herbicide

About this item

  • CONTROLS NUTSEDGE - This product stops the growth of nutsedge weeds by moving through the plant and affecting the underground growing points.
  • TOP SELLER - SedgeHammer is the number one selling nutsedge control product on the market and has years of proven results.
  • EASY TO USE - Simply mix the contents of this .5 ounce packet with one gallon of water and spray the target weeds thoroughly. Pets and people can return to the treated area once the spray dries.
  • SELECTIVE WEED KILLER - This nutgrass killer specifically controls yellow and purple nutsedge and other tough broadleaf weeds and suppresses kyllinga.
  • TURFGRASS SAFE - This product is safe to use on nutsedge after it has emerged in turfgrasses. This product can be used without hurting turfgrasses St. Augustine grass, Bermuda grass, Kentucky bluegrass, and cool & warm season grasses.
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Customer ratings by feature

Easy to use
4.5 4.5
Value for money
3.8 3.8

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$14.05 ($2.81/Ounce)
Get it as soon as Wednesday, Mar 20
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$15.52 ($67.48/Fl Oz)
Ships from and sold by Amazon.com.
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$13.19 ($0.82/Fl Oz)
Get it as soon as Wednesday, Mar 20
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Gowan USA 51496 SedgeHammer, 13.5g - 5oz, White
Monterey Gowan USA 51496 SedgeHammer, 13.5g - 5oz, White
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Price$14.05$89.23$110.22$24.98$49.99-29% $15.52
List:$21.99
Delivery
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Customer Ratings
Easy to use
4.5
4.7
4.5
3.3
Value for money
3.8
4.1
4.2
3.0
Sold By
JandSProducts
Amazon.com
Amazon.com
Amazon.com
Prosentyx, LLC
Amazon.com
active ingredients
Herbicide
halosulfuron-methyl
Dicamba 57.4%, Iodosulfuron-methyl-sodium 1.9%, Thiencarbazone-methyl 8.7%
form
Spray
Granules, Spray
Spray
Granules
Granules
weight
0.03 pounds
0.83 pounds
1.3 ounces
0.23 ounces

Product information

Technical Details

Additional Information

Warranty & Support

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Product Warranty: For warranty information about this product, please click here

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Gowan USA 51496 SedgeHammer, 13.5g - 5oz, White


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Product Description

SedgeHammer+ Turf Herbicide . SedgeHammer+ is a selective herbicide for post-emergence control of sedges. The .5 ounce SledgeHammer Plus Turf Herbicide is safe and provides consistent and complete control of purple & yellow nutsedge without harm to turfgrass, established ornamentals, shrubs, and trees. To use, simply pour the entire half-ounce packet Into 1 gallon of water & spray. It is safe to use as a direct spray on numerous turf varieties and in landscape beds. SedgeHammer+ is made in the US. About Monterey: Monterey Lawn and Garden Products is a leading distributor of plant protection chemicals and fertilizers. We strive to offer home gardeners the same professional-grade technology available to the agricultural industry. Our growing line of products provide economical and effective solutions to yard and garden problems and are properly registered and labeled to be sold to and used by the home gardener.

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
3,207 global ratings

Customers say

Customers like the performance, ease of use, and damage of the weed moss control agent. They mention that it works well, does not harm existing grass, and really kills nutgrass in a single application. They are also satisfied with the effect on grass. That said, some are disappointed with the color, and durability. Opinions are mixed on value and growth.

AI-generated from the text of customer reviews

384 customers mention310 positive74 negative

Customers like the performance of the weed moss control agent. They mention that it works well, is impressive, and produces great results without harming existing grass. Some say that the product is amazing and works great on sedge.

"...It was easy to use because or now includes its own surfactant, it's effective, and it didn't kill anything but sedges...." Read more

"...Compared to other products I've tried like "Image" this stuff worked great...." Read more

"When applied according to instructions this product is outstanding...." Read more

"Works great! I had a major sedge weed infestation, and this knocked it on the head... but it took time, care and patience...." Read more

119 customers mention86 positive33 negative

Customers like the damage of the weed moss control agent. They mention that it really kills nutsedge, eliminates the nutsedge stalks, and rids your beds of nutgrass. Some say that it takes weeks to do the job, but it does the job. Overall, customers are happy with the product's effectiveness and recommend it to others.

"...or now includes its own surfactant, it's effective, and it didn't kill anything but sedges...." Read more

"Took a few days to start working. It is killing the globe sedge and not hurting the Bermuda grass." Read more

"...takes a good two weeks to do it (read the instructions) and the kill is only fair...." Read more

"Kills nutgrass in a single application." Read more

75 customers mention69 positive6 negative

Customers find the weed moss control agent easy to use. They say it's easy to mix up and use, and the directions are decent. The pre-measured packages are easy to carry and use. The product is highly efficient and saves a lot of time. Overall, customers are happy with the product's ease of use and recommend it to others.

"...It was easy to use because or now includes its own surfactant, it's effective, and it didn't kill anything but sedges...." Read more

"...Sedgehammer saves a lot of time, is very cost effective, is highly efficient and can be trusted to rid your yard, garden or flower bed of sedge..." Read more

"...Mixed well." Read more

"...However, it does work and is very easy to apply (just mix in a gallon of water)...." Read more

42 customers mention36 positive6 negative

Customers like the effect of the weed moss control agent on their grass. They say that it has not harmed their plants or lawn, and it hasn't hurt the other grass. Some say that the product didn't even harm their dahlias. However, some customers say that while it does not kill bermuda or bufalograss, it does kill monkey grass.

"...a few days the weeds were yellowing and dying and it caused no damage to my Bermuda grass. Now after 2 weeks it's all but gone. Great product." Read more

"...worked better and faster than I ever imagined it could and it didn't kill the other grass." Read more

"...It is killing the globe sedge and not hurting the Bermuda grass." Read more

"...After one application, all the nutsedge is dead and my grass is fine. It worked perfect...." Read more

82 customers mention34 positive48 negative

Customers are mixed about the value of the product. Some mention that it's worth it for a very pesky weed, while others say that it is expensive and a waste of money to buy this.

"...like it would die but came back after a week or so - it's expensive for a small amount so hate that I will need to use it multiple times" Read more

"...Sedgehammer saves a lot of time, is very cost effective, is highly efficient and can be trusted to rid your yard, garden or flower bed of sedge..." Read more

"...Got a good kill and waited a bit and made another quarter. It's not inexpensive but it killed pesty dollarweed. Yay!" Read more

"...It is relatively inexpensive." Read more

62 customers mention40 positive22 negative

Customers are mixed about the growth of the product. Some mention that it completely eradicated all signs of nutsedge grass after two weeks or so, while others say that the existing sedge stops growing, turns yellow, wilts, and dies.

"Kills nut grass if you follow the instructions, only product I’ve used that works. Mixed well." Read more

"...first thing you do notice after a couple of days is that the nut grass stops growing...it just sits there..looking green and healthy, but there is..." Read more

"...It works amazingly and fries the weeds to the root. They haven’t come back in the area I pour the mixture on." Read more

"This product gets rid of weeds fast." Read more

61 customers mention14 positive47 negative

Customers are not satisfied with the color of the weed moss control agent. They mention that it yellows and turns brown, and then just disappears. Some customers also say that it turns into a gold color and leaves brown spots in their yard.

"Some of it died off and you could tell that some was yellowing like it would die but came back after a week or so - it's expensive for a small..." Read more

"...The sedge turned yellow in a couple weeks. I sprayed again and in two more weeks it was clearly dead...." Read more

"...seems to take a few days and the weed turns yellow. might still have to pull or cut them out, but definitely works." Read more

"...Within a few days the weeds were yellowing and dying and it caused no damage to my Bermuda grass. Now after 2 weeks it's all but gone. Great product." Read more

27 customers mention3 positive24 negative

Customers are disappointed with the durability of the weed moss control agent. They mention that the product starts to wither and die, much slower than Roundup kills regular weeds. They also say that it doesn't last long enough to do the back yard.

"...The sedges didn't die quickly (much slower than Roundup kills regular weeds), but they did stop growing and eventually the sedges looked brownish..." Read more

"Some of it died off and you could tell that some was yellowing like it would die but came back after a week or so - it's expensive for a small..." Read more

"...It was super gradual, the leaves started looking sad after a week, then yellowed after two weeks...." Read more

"...But then, it started to wither and die...." Read more

It will kill grass if you apply too much
4 Stars
It will kill grass if you apply too much
Applied this in August and it controlled nut sedge. New sedge grew and I applied more in September. No effect seen in a week so I applied again. Three weeks later, all the area that I applied twice had all sedge killed, along with the tall fescue and bluegrass. The pattern is clear: about 20 bare spots in the backyard, all had sedge before.Follow-up: The version that I bought from another Amazon seller was likely counterfeit, it was a 4-pack for about $40.
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Top reviews from the United States

Reviewed in the United States on September 10, 2023
Style: Sedge HammerVerified Purchase
2 people found this helpful
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Reviewed in the United States on June 4, 2017
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5.0 out of 5 stars KILLS Sedges! Gone Forever!
Reviewed in the United States on June 4, 2017
I tried using Roundup Plus to kill sedges in my yard and garden, but they just survived right through multipe chemical assaults! I didn't know that for some reason, sedges are "immune" to Roundup, possibly because they have huge energy stores in that nut below ground.

I bought Sedgehammer+ in April after reading reviews here, mixed it in my sprayer tank (1 pouch per 1 gallon, a per instructions), and sprayed everything that looked like a sedge. The sedges didn't die quickly (much slower than Roundup kills regular weeds), but they did stop growing and eventually the sedges looked brownish and died.

My yard is approximately 4000 sq ft after subtracting the house and driveway concrete areas, so is much larger than the 1000 sq ft that one pouch (one gallon, mixed) can treat. However, I did not spray the entire yard with Sedgehsmmer+. I only sprayed the edges themselves, so one pouch was sufficient to treat the areas where I needed it.

Attached are two photos. The first was taken in the most infested area on April 25th, just after I sprayed. The second was taken this morning (June 4th). As you can see, ALL of the sedges are gone. What's left there is the yucky, wimpy Bermudagrass (NOT recommended for any yard!). I'm waiting for the St Augustine in the top of the photo to fill in. It's gradually taking over the yard from each neighbor. (St Augustine is really the only effective grass for south Louisiana, btw.)

I can't say enough to recommend Sedgehammer+ No Surfactant Needed. It was easy to use because or now includes its own surfactant, it's effective, and it didn't kill anything but sedges. If you have sedges in your yard or garden, use Sedgehammer. It works!
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3 people found this helpful
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Reviewed in the United States on October 16, 2023
Style: Sedge HammerVerified Purchase
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4.0 out of 5 stars It will kill grass if you apply too much
Reviewed in the United States on October 16, 2023
Applied this in August and it controlled nut sedge. New sedge grew and I applied more in September. No effect seen in a week so I applied again. Three weeks later, all the area that I applied twice had all sedge killed, along with the tall fescue and bluegrass. The pattern is clear: about 20 bare spots in the backyard, all had sedge before.

Follow-up: The version that I bought from another Amazon seller was likely counterfeit, it was a 4-pack for about $40.
Images in this review
Customer image Customer image
Customer imageCustomer image
Reviewed in the United States on June 25, 2023
Style: Sedge HammerVerified Purchase
4 people found this helpful
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Reviewed in the United States on April 25, 2015
3 people found this helpful
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Reviewed in the United States on August 16, 2023
Style: Sedge HammerVerified Purchase
Reviewed in the United States on January 31, 2024
Style: Sedge HammerVerified Purchase