Customer Reviews for Killzall Weed and Grass Killer - 41% Glyphosate

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Average Customer Rating

4.5 of 5 stars
(190 customer reviews)
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  • 2 of 5 Stars

    Surprizingly dissatisfied

    By Linda on 10/11/2015

    First of all, trying to interpret the ratio of Killzall to use in a hose distributor bottle is so not clear. I guess they want you to buy a Killzall hose distributing bottle. I sprayed at least 7 days ago --we've had no rain-- and not one weed (they are located in a utility easement area) is dead. I upped the 5T of Killzall per gallon of water (cause the bottle is only quart size) and the weeds are happy as ever.

    Expert Response  Expert response:
    We apologize you had some issues using the Killzall. The Killzall label does have a specific mixing instructions graph that lets you know exactly how to use the product in different types of hose end sprayers (ones that you just add chemical to the small tank and the other type where you chemical and a certain amount of water to the small tank). They only list the ones they manufacturer because there are 100's of brands on the market and they all work a little differently. The hose end sprayer usually comes with instructions that explain how to use liquids in the sprayer. Is it possible your hose end sprayer was not properly calibrated? This could be the reason why you are not seeing the expected results. We would recommend using a hand pump sprayer or making sure you hose end sprayer is properly calibrated and spraying the weeds again. It is also important to note that Killzall will only work on actively growing weeds and should not be used directly after or directly before cutting or mowing as the plant will not absorb the product. You should give the product about 14 days to show results. Please let us know if we can be of further assistance. We are always happy to help!

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    26 of 26 people found this review helpful

  • 2 of 5 Stars

    great to kill grass, weeds not so much

    By Jessica on 07/12/2019

    Verified Purchase

    2 stars for killing grass.. lol living in arizona i dont have much of it.. but i do have WEEDS! and i wanted something that killzall.. i looked up my weeds then looked up my weeds on this site... this fit the bill... and sprayed june 20th sprayed the entire bottle in front and back yard.. and its july 12th and the grass is yellow and dead but the weeds just keep on growin!

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    2 of 2 people found this review helpful

  • 2 of 5 Stars

    Kills all weed & grass killer

    By Leo on 07/08/2015

    Works very slow and doesn't kill everything Disappointed

    Expert Response  Expert response:
    We are sorry that you are disappointed with the results of this product. You may need to adjust the dilution rate for tougher plants such as brush or woody plants. Also, herbicides will work more slowly on plants that are not actively growing and/or plants that are under stress from drought or heat. We are happy to discuss your treatment via email or via telephone at 866-581-7378 M-F 9a-5p EST.

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    1 of 2 people found this review helpful

  • 2 of 5 Stars

    Disappointed

    By Tom on 06/10/2015

    We've used various weed killers around the property for 20+ years. The Glyphosate content may not be high enough in this product. It was not effective as a general weed killer.

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    0 of 3 people found this review helpful

  • 2 of 5 Stars

    round up is better

    By David on 09/09/2016

    Took days for results.

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    0 of 3 people found this review helpful

Displaying 1 to 5 (of 5 reviews)