SedgeHammer Herbicide

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SedgeHammer Herbicide

Sedgehammer

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

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   121
4 stars   26
3 stars   5
2 stars   4
1 star   11

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Average Customer Rating
4.4 star rating (167 reviews)

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Most Helpful Customer Reviews
  • 96 of 99 people found this review helpful:

    5 of 5 Stars  It works!
    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!

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  • 52 of 52 people found this review helpful:

    5 of 5 Stars  Sedgehammer
    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.

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  • 50 of 51 people found this review helpful:

    5 of 5 Stars  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.

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  • 38 of 40 people found this review helpful:

    4 of 5 Stars  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.

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  • 33 of 34 people found this review helpful:

    5 of 5 Stars  SedgeHammer Works!
    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 $$.

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Most Recent Customer Reviews
  • 5 of 5 Stars  Die nutgrass, DIE!
    By Mark on October 2, 2014

    I love doing business with domyownpestcontrol.com. The ordering, payment process and communications regarding the order are always impeccable. They usually ship faster than I expect and it always arrives in good condition. The price is almost always excellent, too. You just can't get any better than that!

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  • 5 of 5 Stars  SedgeHammer Herbicide
    By David on October 1, 2014

    So far so good, but you got to wait for few weeks to see result. it won't hurt your lawn which it is truth if you follow a instruction of product refer. Thank D.M.O.P.C carry a lot of excellent products.

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  • 5 of 5 Stars  SedgeHammer Herbicide
    By K on September 30, 2014

    This is a great product. I applied it as directed and the results were as I was promised. It did take a little longer to kill the nutsedge grass weed but nonetheless it did its job in about 3 weeks. At first I was a little afraid to use the product for fear it would harm my animals. I worried for nothing. I've purchased extra of this product in case I found the nutsedge weed in other areas of my yard. Once I determined I was terribly allergic to this grass weed, I do not want to be without an eradicator. Thanks for the product. There are several YouTube videos from lawn care providers about nutsedge grass weed that promotes this product and provides additional advise on how and when to apply.

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  • 5 of 5 Stars  sedge hammer
    By Robert on September 29, 2014

    Good stuff. Within a week of spraying nut sedge turned yellow. Within 2 weeks drying and dying out. Follow instructions carefully. Wait 3 days after mowing and don't cut after spraying for 3-4 days. Would buy again. Bob

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  • 1 of 5 Stars  nutgrass killer
    By Laurie on September 29, 2014

    I purchased 3 packages of the herbicide. I used one package, but so far we haven't seen any results. I'm going to use the second package today. Hopefully we'll have better luck. I'll update the review after the 2nd application has had a chance to work.

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  • 5 of 5 Stars  Sledgehammer herbicide
    By Yvonne on September 29, 2014

    Doing the Job controlling the nut grass pleased with results recommended it to friends

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  • 5 of 5 Stars  Excellent Product
    By Daniel on September 28, 2014

    Excellent product. Produces results as advertised and works on other weeds also. Would recommend to any one with a Sedgeweed problem.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  SedgeHammer Herbicide
    By Tom on September 20, 2014

    Considering that it take awhile for this product to fully work work I can only judge based on current progress. The biggest thing I've noticed is the plant has stooped growing. Normally after mowing the plant would grow up to two inches by the next day. It milliner out paces the turf growth. Also it has finally started turning yellow which I suspect is further evidence that it is working.

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  • 4 of 5 Stars  Sedgehammer Herbicide
    By Earl on September 20, 2014

    Overall, I'm very pleased with Sedgehammer. I had a pretty heavy infestation of sedgegrass in my tall fescue lawn, and the SH killed about 75% of it on the first application. I still have a little bit of the sedgegrass but will be doing the second application today, so hopefully the rest of this nasty stuff will be history soon.

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  • 4 of 5 Stars  sedgehammer works
    By Mike on September 18, 2014

    very expensive, but it works great. in two weeks the sedges turn brown and die off. did not harm the lawn either.

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Most Helpful Q&A's

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.

32 of 32 people found this answer helpful.
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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.

17 of 18 people found this answer helpful.
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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.

15 of 15 people found this answer helpful.
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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.

14 of 14 people found this answer helpful.
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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.

11 of 12 people found this answer helpful.
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Most Recent Customer Questions

September 19, 2014 Christine from Jackson, Tn asked:

QHow do you kill mallow?
My neighbors yard is covered in back and now spreading to his front. I have found patches of this weed in my yard. How do I stop the spread? If I kill in my yard and he doesn't treat his am I fighting a losing battle?

A We would recommend using Sedgehammer Herbicide. It is labeled to control mallow after it has already emerged. Sedgehammer can be used on just about any type of lawn, St. Augustine included. The Sedgehammer will control it in your lawn but your neighbor would have to do the same thing in order to make sure it is not continually spreading. Please let us know if you have any additional questions.

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September 9, 2014 Shawn from Lincoln, Ne asked:

QUse of SedgeHammer around the edge of a pond?
Can you use SedgeHammer around the edge of a pond. Currently our pond level has dropped and I sprayed Rodeo herbicide around the edge of a stocked pond to kill a variety of weeds and cattail, but it does not seem to touch the yellow nutsedge. Any advice would be great.

A

SedgeHammer is not recommended to be used in or around bodies of water. According to the SedgeHammer Herbicide label, do not apply directly to water, to areas where surface water is present or to intertidal areas below the mean high water mark.
We recommend adding a surfactant in addition to the Rodeo. DyneAmic Surfactant will act as a sticking agent to help the Rodeo absorb quicker into the weed resulting in faster knockdown.

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September 2, 2014 Josh from Arcadia asked:

QIs Sedgehammer OK for St. Augustine flora-tam grass?
Can this be used for spot treatment only or for a entire Flora-tam Lawn? Will it kill or affect the grass in anyway? Thanks.

A There are no restrictions with Sedgehammer on established St. Augustine Flora-Tam grass. It can be applied to your entire lawn. Please let us know if you have any additional questions.

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August 24, 2014 Cindy from Scottsdale, Az asked:

QWill Sedgehammer harm our fruit trees
Grapefruit, orange and Lemmon

A

The Sedgehammer herbicide kills nutsedge without injury to turfgrass, established ornamentals, shrubs, and/or trees. 

Certain products are not labeled for use around edibles as it could cause harm to the plant either through absorbing it into the food you are going to eat, or by killing the plant. Unless it has an agricultural label you can not use it around edibles or near the drip line. If you want more details on how using SedgeHammer to close to edibles can affect them, you can contact the manufacturer Gowan at (800) 883-1844.

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August 21, 2014 Nick from San Gabriel,california asked:

QAfter applying SedgeHammer to some nut grass in planter area, how long do have to wait to put in azalea plant?
I want to put azalea plants in area where nut grass is located.

A Per the manufacturer, you would need to wait a few months in order to plant the azaleas as you will have to do multiple treatments of SedgeHammer. When you do plant them, make sure you are not using the soil that was treated with SedgeHammer. Use either topsoil or untreated soil from another area on the property. They did also recommend that you plant the plant first, get the roots established and then use the SedgeHammer. Do not spray direct on the azaleas to avoid damage. Please let us know if you have any additional questions.

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August 4, 2014 Alma from El Paso, Tx asked:

QIs it safe to use Sedgehammer directly around the base of established trees in the lawn?
I have a lawn that is almost completely nutgrass. I have mature mulberry and ash tress in the lawn as well. I don't want to kill my trees but the nutgrass has completely taken over. Is it safe to spray Sedgehammer directly over the lawn that covers the roots of my trees? Thank you for such an informative website!!!

A Sedgehammer may be applied to nutsedge that is at the base of a tree without harming the tree as long as you do not spray over top the tree as a broadcast. Try to be careful of overspray that may get on the tree as the label states that sprays directed over-the-top of trees may lead to damage of the tree.

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July 22, 2014 Valerie from Riverhead, Ny 11901 asked:

QHow soon can I apply Sedgehammer after applying a fungicide?
We applied Scotts Lawn Fungus control today July 22.

A We apologize, we are not familiar with Scotts Lawn Fungus. Normally, there is not an issue with applying Sedghammer over a fungicide. We recommend to contact both manufacturers to be sure. Sedghammer is Gowan 800-643-0400.

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July 3, 2014 Jacqueline from Houston, Tx asked:

QMy dogs tend to chew on anything I spray, is it still safe to use Sedgehammer in my yard after it has dried?
This is why I have such a sedge problem. I have found other organics that work on everything else, but the nut sedge is a pain!

A

It is safe for pets to be around the area Sedgehammer has been applied, after the treated areas have completely dried.  The small amount of active ingredient that is on the grass is not enough to harm a dog.

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June 18, 2014 William from Wb.smith73@yahoo.com asked:

QCan I use Sedgehammer in my vegetable garden?

A Sedgehammer is meant more for nutsedge control in turf grass and it cannot be used near a vegetable garden or anything edible. For nutsedge in landscaped areas it is recommended to spot treat the sedge with a glyphosate or Round Up type product directly.  We recommend Roundup QuickPro 1.5 oz. packs for ease of use.

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June 4, 2014 Omar from Mcfarland, California asked:

QWill Sedgehammer Herbicide kill flowers?

A The Sedgehammer Herbicide is labled to control only the broadleaf weeds listed, however since flowers are considered a broad leaf plant species as well, you would want to not spray over the top of the desireable plants. Try to limit sprays to only the weeds you wish to eliminate and be cautious of any drift of the product to nearby flowers.

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