Hi-Yield Grass Killer Post-Emergent Herbicide

$25.95 - $228.00

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4 out of 5 stars Rating: 4

8 Reviews | 39 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.

Rating Snapshot

5 stars   6
4 stars   0
3 stars   0
2 stars   0
1 star   2

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Average Customer Rating
4 out of 5 stars (8)

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  • 24 of 25 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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  • 19 of 19 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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  • 10 of 10 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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  • 5 of 7 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 people found this review helpful:

    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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  • 2 of 2 people found this review helpful:

    1 of 5 stars  Didn't work
    By Amy in Keeling, VA on 06/29/2017

    I used this 3 times on my veggie garden and it had no impact at all. I foolishly didn't treat or paper my garden this year and it's been out of control. I spoke to a rep from this company who assured me that this product was all I needed for killing/preventing the grass without harming my veggies. This product didn't do anything. Total waste of money.

    Expert Response   Expert response:
    Thank you for your review. We apologize you are not getting the expected results. We would like to help troubleshoot. With the Hi Yield Grass Killer Post-Emergent Herbicide a 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. With this product you would need 1 tablespoon of surfactant per gallon of mixture. 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.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Really goes after the Bermuda!
    By George in Newnan, GA on 06/14/2017

    Bought a home that has a centipede lawn. In sunny areas, Bermuda had really infiltrated and was completely taking over the centipede. This product is killing the Bermuda and leaving the centipede untouched. I have heard others it requires multiple applications to take out the Bermuda. In my case, it seems to be doing it in one! Just make sure to combine it with a surfactant when applying.

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  • 1 of 5 stars  Hi yield grass killer
    By Will in Tehachapi, California on 04/12/2017

    Did not work at all.

    Expert Response   Expert response:
    Thank you for your comments! We are sorry that you have not seen the desired result using the Hi-Yield Grass Killer. Keep in mind that you should always use this product with a surfactant such as Hi-Yield Spreader Sticker for best results with this and most other grass killers: http://www.domyownpestcontrol.com/hiyield-spreader-sticker-p-1898.html Please let us know if we can further assist you. If you would like to tell us more about what you are treating, then we may be able to offer more detailed advise. We appreciate your feedback and your business!

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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.

23 of 27 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.

11 of 11 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.

6 of 7 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

5 of 5 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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Most Recent Customer Questions

06/27/2017 Bobby from Boaz

QHow long to see results after spraying Hi-Yield Grass Killer Post-Emergent Herbicide?

A

Hi-Yield Grass Killer stops grass from growing within 2 days of application, and you should start to notice results within 7-14 days.

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06/08/2017 Michael from Altus, Ok

QWill Hi-Yield Grass Killer Post-Emergent Herbicide kill johnsongrass in cowpeas?

A

Hi-Yield Grass Killer Post-Emergent Herbicide† is labeled for controlling johnsongrass on green peas and dry peas. It does not specifically label cowpeas.

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05/30/2017 Don from Ruston

QCan Hi-Yield Post-Emergent Grass Killer be re-applied on garden plants if new growth of grass appears?

A

Yes, if new growth appears, you may re-apply Hi Yield Post Emergence Grass Killer†when grassy weeds are actively growing. Younger, actively growing seedling weeds are more easily killed than older, mature, well-established grassy weeds which may require a repeat application for control. Please refer to the product label for a list of tolerant plants, vegetables and fruits.†

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05/16/2017 Myra from Tuscaloosa, Al

QWill Hi-Yield Grass Killer Post-Emergent Herbicide kill my white clover?
I have it planted for my bees

A

Hi-Yield Grass Killer Post-Emergent Herbicide will only kill grassy weeds and will not affect broadleaf weeds. The white clover will not be affected by the product.

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05/05/2017 Mac from Florence, Sc

QIs Hi-Yield Grass Killer Post-Emergent Herbicide safe to use on Bermuda in St. Augustine Grass?

A

Hi-Yield Grass Killer Post-Emergent Herbicide could be harmful to both Bermuda and St. Augustine Grasses.

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04/20/2017 Steve from Syosset, Ny

QHow effective is Hi-Yield Grass Killer Post-Emergent Herbicide on getting rid of bent grass?
Will it harm groundcovers like vinca minor?

A

Hi-Yield Grass Killer Post-Emergent Herbicide will control Bentgrass. Since it's not labeled for use around Vinca Minor we cannot recommend to apply it there. Spot treatment would be our recommendation.

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04/07/2017 Melissa from Wapakoneta, Ohio

QDoes it have to be a certain temperature outside to use Hi-Yield Grass Killer Post-Emergent Herbicide?

A

You should apply†Hi-Yield Grass Killer Post-Emergent Herbicide when the target plants are young and actively growing for best results. This is usually when temperatures are around 60-85 degrees F.

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04/05/2017 Brandi from Ovid, Id

QIs Hi-Yield Grass Killer Post-Emergent Herbicide safe to use around my garden peonies, daylilies, bleeding hearts, and hesperis (dame's rocket)?

A

The Hi-Yield Grass Killer Post-Emergent Herbicide is labeled to be used for daylilies and bleeding hearts. Unfortunately, the†Hi-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.

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04/04/2017 Robert from Picayune, Mississippi

QDoes Hi-Yield Grass Killer Post-Emergent Herbicide kill centipede grass?

A

Hi-Yield Grass Killer Post-Emergent Herbicideis not labeled as tolerant on Centipede turf, so we would not recommend using this product there. If you would like to tell us more about what weed you are targeting, then we are happy to recommend an alternatitve product.

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04/01/2017 Jtw from Fayetteville, Ga

QCan Hi-Yield Grass Killer Post-Emergent Herbicide be used under pecan trees in a centipede lawn?

A

Hi-Yield Grass Killer Post-Emergent Herbicide†is a grass killer than can harm the centipede lawn so would not be recommended to be used on it, nor is is labeled as safe to apply around pecan trees.

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