Hi-Yield Grass Killer Post-Emergent Herbicide

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5 out of 5 stars Rating: 5

5 Reviews | 22 Q&A

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Hi-Yield Grass Killer Post-Emergent Herbicide bottle (8 oz)

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Hi-Yield Grass Killer Postemergence Herbicide - Case (12 x 8 oz bottles)Hi-Yield Grass Killer Postemergence Herbicide - Case (12 x 8 oz bottles) case (12 x 8 oz bottles)

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Hi-Yield Grass Killer Post-Emergent Herbicide

Hi-Yield Grass Killer is a post-emergent selective herbicide that kills annual and perennial grasses in ornamental landscapes and desirable plants.  Can also be used on trees, shrubs, and ground covers. Hi-Yield Grass Killer stops grass from growing within 2 days of application.

For best results you should add a surfactant to your solution to help the product stick to the target weeds and grass.




Hi-Yield Grass Killer is a postemergent selective herbicide that kills annual and perennial grasses in ornamental landscapes and desirable plants. Can also be used on trees, shrubs, and ground covers. Hi-Yield Grass Killer stops grass from growing within 2 days of application.

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5 out of 5 stars (5)

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  • 17 of 18 people found this review helpful:

    5 of 5 stars  A good deal
    By Nancy in Bonaire, GA on 03/17/2015
    Verified Purchase

    I used this product once last summer and it stopped my Bermuda grass from growing within my Centipede. The runners appear green when runner stalks were broken even though they have not grown any...so I am going to use this again in a few weeks to prevent any spring growth. So far, it is the only thing I have found to eliminate the Bermuda.

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  • 11 of 11 people found this review helpful:

    5 of 5 stars  Great service!
    By Bruce in Phelps, NY on 09/09/2015

    Ordered Hi-Yield grass killer on Monday and received it on Thursday. I had a number of Crab Grass patches in our lawn and used it as a spot spray on those patches. Follow the label and add a spreader sticker oil. It has been several days and the Crab Grass appears to be killed and I am satisfied with the product.

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  • 4 of 4 people found this review helpful:

    5 of 5 stars  Killing bermuda in centipede
    By Ultracon in Georgia on 05/23/2016

    This stuff really works when used with the surfectant! After one application, the bermuda has stopped growing and is dying. The centipede is untouched! A second application will be going on in a week or so. This is really, really, good stuff and worth the $$!!!!! Be sure to get the surfectant as well to mix them together. A solution to my problem after years of digging and pulling!

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  • 0 of 1 people found this review helpful:

    5 of 5 stars  HY YIELD GRASS KILLER
    By R in ALABASTER AL on 08/23/2016

    WORKS GREAT TO KILL BERMUDA AND CRABGRASS IN CENTIPEDE LAWN.

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  • 5 of 5 stars  Dave
    By David in Hodges, SC on 09/07/2016

    excellent product, killed all my wild grasses and did not harm my centipede

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Most Helpful Q&A's

07/28/2012 Charles from Possum Ridge Alabama

QWhat is "oil concentrate"?
Why is it not in "Hi-Yield" grass killer or why is not stated on front of label that it will be needed? Frustrating to drive one hour home to read label and then find out!

AWe are not the manufacturer so we cannot comment on why it is not on the label.  When an herbicide calls for oil, it is referring to a surfactant.  Surfactant helps the herbicide stick to the waxy coating of the weeds and lawn you are applying it to.  It improves the effectiveness of herbicides greatly.

18 of 22 people found this answer helpful.
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04/22/2014 Helen from Lyndon, Kansas

QIs Hi-Yield OK for berries and conifer plantings?
I'd like to keep the grass away from our rows of blackberries and also plan to put in a windbreak of Eastern Redcedar, Mulberry, and American Plum and need to keep grass away from the seedlings. Safe?

AYes, the Hi-Yield Grass Killer Postemergence Herbicide is labeled to be used around fruits, vegetables, and ornamentals without fear of damaging these desirable vegetation.

6 of 6 people found this answer helpful.
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07/23/2013 S from Woodstock Ga

QWhat types of oil can be used as a surfactant? I've used dish detergent in the past with other products.

AThe manufacturers normally recommend that you use some type of certified surfactant with their products like the Non Ionic Surfactant. With a Glyphosate product like the Hi Yield Grass Killer Herbicide, you would need 1 tablespoon per gallon of mixture. Please let us know if you have any other questions.

4 of 6 people found this answer helpful.
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04/22/2015 Joyce from Holley, Ny

QCan I use Hi-Yield Grass Killer safely on the grasses growing in my iris plants?

A

Hi-Yield Grass Killer is a post-emergent selective herbicide that kills annual and perennial grasses in ornamental landscapes and desirable plants. Iris plants are tolerable per the product label. You will use 1 fl. oz. per gallon of water and add a surfactant such as Hi-Yield Spreader Sticker.

4 of 5 people found this answer helpful.
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08/14/2013 Dave from Northcentral Wisconsin

QWill the Hi-Yield Grass Killer Postemergence Herbicide harm asparagus or chicory
Plan to use on garden and wildlife food plots

AThe product label for the Hi-Yield Grass Killer Postemergence Herbicide does state it can be safely applied to asparagus and several other types of vegetables.  We have contacted the manufacturer to ask about chicory and wild food plots as those are not on the label and will let you know what we find out

4 of 4 people found this answer helpful.
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Most Recent Customer Questions

05/10/2016 Todd from Mullins

QWill Hi-Yield Grass Killer Post-Emergent Herbicide get rid of bermuda grass in a centipede lawn?

A

No,†Hi-Yield Grass Killer Post-Emergent Herbicide will not get rid of bermuda grass in a centipede lawn.† Unfortunately, centipede and bermuda grasses are so closely related that any product that would kill the bermuda would also kill the centipede.† In this type of situation, we usually recommend using a glyphosate product such as Roundup Quik Pro to spot treat the bermuda grass as much as possible, and then replanting the centipede in a couple of weeks when the bermuda is gone.†

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03/30/2016 Kathy from Newberg, Or

QCan Hi-Yield Grass Killer Post-Emergent Herbicide be used around roses?

A

Yes, Hi-Yield Grass Killer†Post-Emergent Herbicide can be used around roses and other ornamental plants and flowers.

1 of 1 people found this answer helpful.
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10/02/2015 Randy from Fort Garland, Colorado

QCan I safely use Hi Yield Grass Killer around lilacs, bush cherries, chokeberries, and raspberries?

A

Yes, Hi Yield Grass Killer is designed to only target grasses and grassy weeds in ornamental and edible garden areas and will not harm your plants. You would use 1oz per gallon of water with 1oz surfactant and spray until thoroughly covered.†

1 of 1 people found this answer helpful.
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08/28/2015 Kathy from Mccomb, Ms

QWill Hi-Yield Grass Killer Postemergence Herbicide kill centipede grass?
I'm enlarging a flower bed and need to kill a strip of centipede grass. Will this product do that?

A

Hi-Yield Grass Killer Postemergence Herbicide could harm or suppress Centipede grasses. We would recommend to just spot treat the area with Roundup.

3 of 3 people found this answer helpful.
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07/26/2015 Mia from Fairhope, Al

QCan I use Hi-Yield Grass Killer Postemergence Herbicide on my St Augustine lawn?
I was told I could use this for crabgrass in my St. Augustine lawn and that it would not hurt the S.t Augustine. Is this true?

A

 Hi-Yield Grass Killer Postemergence Herbicide  could harm St. Augustine grasses or other turf. Hi-Yield Atrazine Weed Killer can safely be applied to St. Augustine grass for crabgrass suppresion. Be sure to follow the product label for complete application instructions.

3 of 3 people found this answer helpful.
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07/24/2015 Toni from Colorado City, Tx

QCan I use Hi-Yield Grass Killer Postemergence Herbicide to kill Bermuda grass where I have dichondra as a ground cover?

A

Yes, according to the Product LabelHi Yield Grass Killer Postemergence Herbicide is labeled to kill Bermuda Grass, and Dichondra turfs have shown to be tolerant.

2 of 3 people found this answer helpful.
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05/21/2015 Holly from Mountain City,tn

QIs Hi-Yield Grass Killer safe for honeybees after it has dried?

AHi Yield Grass killer could harm Honey bees that come in contact with it when it is wet. 

2 of 4 people found this answer helpful.
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05/20/2015 Kenny from Durant Ms

QCan I plant soybeans, corn and peas safely after spraying Hi-Yield Grass Killer Postemergence Herbicide?

AHi-Yield Grass Killer Postemergence Herbicide does not list soybeans or corn as tolerable to planting in areas that will be treated with this product. Please provide more information on what you are treating for and how long ago you treated with the product for a recommendation that will best fit your needs.

2 of 2 people found this answer helpful.
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05/03/2015 Laura from Sioux Falls Sd

QCan Hi Yield Grass Killer be used with fern peonies, tree peonies and other herbaceous peonies?

AHi-Yield Grass Killer Postemergence Herbicide does not specifically list fern peonies, tree peonies and other herbaceous peonies on the product label as tolerable to this product. Please tell us more about what you are treating for so that we are able to locate a product that will best fit your needs. We can also be reached at 866-581-7378 M-F 9-5PM EST.

2 of 2 people found this answer helpful.
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03/17/2015 Michael from Bentonville

QIs Hi-Yield Grass Killer safe for junipers?
3 year old shrubs

AYes, Hi-Yield Grass Killer Postemergence Herbicide is safe to be used around junipers. You will use 1 fl. oz. per gallon of water. This will treat approximately 1,800 sq. ft.

2 of 2 people found this answer helpful.
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