SedgeHammer Herbicide

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SedgeHammer Herbicide pack(s) (13.5 grams)

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SedgeHammer Herbicide - 1.33 oz. bottle bottle(s) (1.33 oz)

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SedgeHammer Herbicide

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.
* 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 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

Indoors

SedgeHammer is not labeled for indoor use of any kind.

Outdoors

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.

SedgeHammer Features

  • 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

Rating Snapshot

5 stars   174
4 stars   35
3 stars   7
2 stars   4
1 star   15

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Average Customer Rating
4.5 out of 5 stars (235)

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Most Helpful Customer Reviews
  • 129 of 133 people found this review helpful:

    5 of 5 stars  It works!
    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!

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  • 75 of 77 people found this review helpful:

    5 of 5 stars  Sedgehammer
    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.

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  • 70 of 71 people found this review helpful:

    5 of 5 stars  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.

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  • 51 of 54 people found this review helpful:

    4 of 5 stars  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.

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  • 47 of 50 people found this review helpful:

    5 of 5 stars  SedgeHammer Works!
    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 $$.

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Most Recent Customer Reviews
  • 4 of 5 stars  SedgeHammer
    By Stephen in Massapequa Park on 07/24/2016

    Works great !! This is the second year I bought this product.

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  • 5 of 5 stars  It works
    By Cindy in Charlotte on 07/23/2016

    I've been fighting nutsedge in my lawn for 6 years and have tried everything known to man to get rid of it, to no avail. Saw the Sedgehammer on the internet and figured I'd give it a try. It really works. It's easy to use. Just put into 1 gallon sprayer and drench the nutsedge. Within 7 or 8 days it will begin to turn yellow and stop growing. I purchased two applications and have used one of them. I'll use the 2nd one soon to finish up what I missed. Very happy with the product. This is the first thing I've used that actually works. Still don't know if it's a permanent solution, but time will tell.

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  • 4 of 5 stars  Nutgrass solution
    By D in Bakersfield on 07/21/2016

    we have used this on lawns of several houses-it seems to work better than most

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  • 4 of 5 stars  Nutgrass solution
    By D in Bakersfield on 07/21/2016

    we have used this on lawns of several houses-it seems to work better than most

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  • 5 of 5 stars  my lawn.
    By Mark in bethpage ny on 07/14/2016

    I have been trying to kill nut grass for a while. I read the internet and heard Sedgehammer does a good job at killing nut grass. It kills the nut grass in one shot for me.

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  • 5 of 5 stars  This stuff works
    By John in Deer Park, Texas on 07/12/2016

    We were return customers, having purchased a case over two years ago. We have neighbors with a bad nutsedge infestation so the grass makes its way into our yard every couple of years. We tried everything to kill it and nothing worked - until we found this product. Spray it on, wait 10 days or so, and your nutsedge problem will be done. Well worth the purchase price - and the vendor is awesome. Now, if I could just work up the nerve to spray my neighbor's yard too :-/

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  • 5 of 5 stars  Hated sedge grass
    By Maurice in Burlington Township NJ on 07/10/2016

    Product is simple and easy to mix and use, it takes a least a week before it seems to work but once it dose it works well.Sedge grass is so hard together rid of but SedgeHammer helps you get started,you just have to keep at it.

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  • 5 of 5 stars  Sedgehammer 1 gallon packets
    By Don in round rock, texas on 07/08/2016

    I've used this several times in mixed grass/shrub environments, always a year or two between uses. I mix one gallon in my hand sprayer and apply liberally a day or so after lawn watering so the grass is a bit thirsty, and three days before the next watering. A week later the Nutsedge is brown and dead, and I dig, not pull, it out so as to get the root bulb. Very seldom I'll see a few I missed first time, and repeat the process. One application lasts for about two years. I'm totally pleased. I keep the extra in a spray bottle in case of a stray plant - none so far.

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  • 5 of 5 stars  Sedge Hammer Really works
    By Kyle in Conroe ,Tx on 07/07/2016

    This stuff really works. It is easy to mix and use.It started working within 24 hours and after a week or so it nut grass was DEAD. Do My Own Pest Control .com was one of the only places I could find this stuff!!!

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Works Well
    By Jay in Arlington, TN on 06/29/2016

    It is a little slow acting but definently works well. I am going to have to order some more.

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Most Helpful Q&A's

04/16/2011 Ken

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.

47 of 47 people found this answer helpful.
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07/11/2011 Laurence

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.

30 of 32 people found this answer helpful.
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02/10/2013 Fred

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.

25 of 26 people found this answer helpful.
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06/26/2011 Tee

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.

23 of 26 people found this answer helpful.
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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

18 of 18 people found this answer helpful.
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Most Recent Customer Questions

03/15/2016 Edward from Spring Valley, Ca

QHow will Sedgehammer affect Duchesnea (Ornamental Strawberries)?
After the client killed lawn with Roundup, we amended the soil and planted Duchesnea. Nutsedge now covers almost 80% of the new plantings!

A

Sedgehammer Herbicide is safe for use around established ornamentals, such as ornamental strawberries.

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03/14/2016 Jose from Miami, Fl

QWhat can I use to control and kill Nutsedge and creeping signal grass on St Augustine grass?
Miami Fl area

A

For nutsedge control it is best treated using something like Sedgehammer Herbicide which is specifically designed for it and is also for some other broadleaf weeds. †For signal grass is it best treated with a pre-emergent like Prodiamine 65 WDG but complete control is not always possible with this weed as it is a very difficult weed to control. †You could also spot treat with a glyphosate based product like GlyPhoSel Pro†and then reseed/so the area. †The University of Florida has some information here about.

1 of 1 people found this answer helpful.
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01/27/2016 Patricia from Fallbrook, Ca

QWill Sedgehammer Herbicide have adverse affects on roses?
I have nutsedge in my rose garden.

A

Sedgehammer Herbicide should not be used over any desirable ornamental plants, including roses. You could spot treat with a product like Roundup in the area.

1 of 2 people found this answer helpful.
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12/27/2015 Art from Lake Mary, Fl

QWhat type of Non-Ionic Surfactant can be used with SedgeHammer Herbicide?

A

The SedgeHammer 13.5 gram box already contains a surfactant so no additional surfactant would be needed. If you are using the 1.33 oz bottle of SedgeHammer, we would recommend using Non-Ionice Surfactant for Herbicides. If using the†1.33 oz. bottle, use 0.9 g (one spoonful) in 1-2 gallons of water with 2 teaspoons of a nonionic surfactant.

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11/09/2015 James from Virginia Beach, Va

QDoes Sedgehammer kill green nutsedge?

A

Yes, Sedgehammer Herbicide is labeled to kill various types of nutsedge, including green nutsedge.

1 of 1 people found this answer helpful.
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10/03/2015 Cdw from Alabama

QWhat time of year is sedgehammer most effective?
Can it be used in the fall or the start of winter? How long do I have to wait before I can Plat a garden after applying sedge hammer?

A

Sedgehammer will only control weeds that are actively growing so it likely will not kill anyting in the winter once the plants are dormant and may only give partial control in the fall. It is best used in the warmer spring and summer months and early fall. Per the manufacturer, if you plan to plant a vegetable garden you cannot do so within 3 years of applying Sedgehammer in the same area unless you remove the soil treated with Sedgehammer and bring in fresh soil.†

2 of 2 people found this answer helpful.
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09/15/2015 William from Melbourne Beach, Fl

QWandering Jew and Sedge control in southern Floratam lawn?
Can you recommend a product that will safely kill wandering jew in Floratam? I also have some sedge and have been told that Sedgehammer is safe in Floratam. Will it have any effect on the wandering jew?

A

Sedgehammer can be used in St Augustine grass per the product label but is not labeled for wandering jew and we do not have a product that is labeled for this weed.  It might be best to spot treat this weed with a glyphosate based product and reseed the areas.

0 of 1 people found this answer helpful.
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09/09/2015 Pam from Jacksonville, Fl

QCan I use dish soap as a surfactant with Sedghammer?

A

We have heard some folks use dish soap as a surfactant. We cannot recommend it, because there is not enough research behind it. We recommend a product like Non Ionic Surfactant to be mixed with Sedgehammer

0 of 1 people found this answer helpful.
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09/09/2015 Brad from Mt Vernon

QCan I use Sedgehammer on new seedling or will it hurt them and not make them grow?

A

Sedgehammer can be applied to established listed turfgrasses for nutsedge control. Allow 4 weeks between application and seeding. Please refer to the product label for complete mixing and application instructions.

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09/06/2015 Brad from Mt Vernon

QHow long do I have to wait after spraying Sedgehammer on new seedlings?

A

Sedgehammer Herbicide should be applied to established lawns allowing 4 weeks between seeding and application. Please refer to the product label for specific mixing and application instructions.
 

1 of 1 people found this answer helpful.
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