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

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Average Customer Rating

4.5 of 5 stars
(204 customer reviews)
Displaying 1 to 30 (of 204 reviews)
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  • 1 of 5 Stars

    Weed Killer

    By Frank on 09/22/2011

    Not impressed. I've used Roundup in the past and had much better results. I guess the added 10% does make a substantial difference.

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    3 of 10 people found this review helpful

  • 1 of 5 Stars

    Killzall

    By Thomas on 06/05/2012

    I purchased this product because I was told it would kill Ivey but it does not come close to killing it. I have tried mixing it stronger and spraying more often but the truth is this stuff does not work. Very Disappointed...

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    15 of 33 people found this review helpful

  • 1 of 5 Stars

    Killz-NOTHING

    By David on 04/15/2013

    Verified Purchase

    Seriously, this is by far the worst product I have ever purchased to kill weeds or kill grass. I even used half of the bottle (5 tablespoons is recommended) in a mix in an attempt to get some results, and it still didn't work! This product should be called Killz-Nothing. I'm sick of product advertising how great they are and then being the direct opposite. It borderline the illegal.

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    12 of 42 people found this review helpful

  • 1 of 5 Stars

    Not impressed

    By Dennis on 01/27/2015

    Verified Purchase

    Followed the directions, a week later weeds started to get a little yellow. Had to spray again. Still not happy. You would think with a name like Killzall, everything would die.

    Expert Response  Expert response:
    Any post-emergent herbicides will work best when the plants are actively growing, as this will cause the active ingredient to translocate through the plants much more quickly. Be sure to follow the label directions to use the best dose for the plants you are targeting. More mature plants or woody/vine species may require multiple applications. We are always happy to discuss your treatment over the phone at 866-581-7378 M-F 9a-5p EST.

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    14 of 17 people found this review helpful

  • 1 of 5 Stars

    not happy with Killzall Weed and Grass Killer

    By Quan on 05/28/2019

    Not satisfied with results, waited a week and weeds did not fully die, they began to come alive again. I even tried increasing water mixture ratio. Results were very very minimal. I am upset with the money i spent on this product according to the advertisements. I do not recommend this product and will not buy again.

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    3 of 4 people found this review helpful

  • 1 of 5 Stars

    Very very Poor Results

    By Dave on 01/17/2020

    Put on as directed per the bottle directions, waited the required time and nothing, looked like the weeds were laughing at us. I will not waste my money on this one again. When you are on a fixed budget you have to watch your pennies!

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    2 of 3 people found this review helpful

  • 1 of 5 Stars

    Doesn't work.

    By Jeffrey on 08/06/2020

    I purchased this weed and grass killer to kill... and this only seems to kill grass. After I applied, I waited 5 days and contacted DoMyOwn. We reviewed the mixture amount and it was correct. They mentioned per the manufacture, it was not enough time and to allow it 2 weeks. It has been 2 weeks and I am still not happy with this. I have applied this to NOT thick areas, only minor overgrown areas. Some of the weeds have turned slightly yellow, but they're not dying. DoMyOwn offered the manufactures contact info but no thanks, my money is with DoMyOwn and so I'll leave the review here. There are better products out there. Faster working too. Get anything but this.

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    3 of 3 people found this review helpful

  • 1 of 5 Stars

    Killzall Weed and Grass Killer

    By Steven on 04/23/2021

    Was told I needed a high Glyphosate concentration in order to kill weeds and grass, specifically snake weed. So, I read the directions and add MORE than what was called for in my backpack sprayer. I sprayed at the rate on where I needed items killed and one week later there was just SOME leaf curling. Nothing to write home about here. I need a product that kills like what they spray power lines and RR tracks with. None of this over priced product that the plants think is fertillizer.

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    2 of 2 people found this review helpful

  • 1 of 5 Stars

    Worthless

    By Roy on 05/19/2022

    Waste of money and time. Even full strength did not do the job.

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    2 of 3 people found this review helpful

  • 1 of 5 Stars

    Doesn't work

    By Tony on 04/28/2023

    'I wound up using the whole bottle on just my 1/4 acre backyard alone over a week and you can't even tell .

    Expert Response  Expert response:
    We apologize you did not achieve the intended results. It may take repeat applications to get complete control of all weeds depending on the type and maturity. We would welcome the opportunity to troubleshoot the application to help get you the results you need. Please contact us at your earliest convenience!

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    1 of 1 people found this review helpful

  • 1 of 5 Stars

    Kills all weed

    By Celina on 05/19/2023

    Did kill the weeds if anything got greener and they grew.

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  • 1 of 5 Stars

    Killzall Weed Killer

    By Marcus on 05/11/2024

    I bought 2 jugs of this product. This product didn’t work as I expected. I followed the recommendations for the mixers and have to spray an area in my yard twice. On a different area I mixed a little more thinking it would do the trick but it did not work out as I expected.

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    1 of 1 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

    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

    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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    30 of 30 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

  • 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

    Killzall Weed and Grass Killer - 41% Glyphosate Quart Review

    By Ted on 05/17/2024

    VERY slow acting. I had to do two coats and still not 100% kill. I would upload a picture for reference but no way to do so.

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    0 of 1 people found this review helpful

  • 3 of 5 Stars

    Did not recieve this item

    By Stacey on 09/19/2013

    I never received the item ordered Aug 29th. After a couple of weeks I finally called them. They were SO nice and willing to help, they sent out another bottle asap and I received that one within a few days. Still would have liked to have had the product on time....really needed to kill weeds!

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    1 of 3 people found this review helpful

  • 3 of 5 Stars

    Killzall?

    By Leonard on 06/08/2014

    It killed some but it sure did not kill all! For that price I expected a lot more!

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    0 of 2 people found this review helpful

  • 3 of 5 Stars

    Based on reviews

    By Angelo on 06/15/2014

    Verified Purchase

    I have never used this product. I purchased it based on reviews here, I will let you know the results when I see it. Do not be concerned with the 3 star rating. I have to rate something. I am sure I will change it once I have seen the results

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    1 of 16 people found this review helpful

  • 3 of 5 Stars

    Killzall compared to Roundup

    By Jay on 05/31/2017

    Mixing at proper rate is just like Roundup sometimes it works sometimes it doesn't even with the right conditions on the label was actually disappointed. Was hoping for something better than Roundup

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    3 of 6 people found this review helpful

  • 3 of 5 Stars

    Killzall

    By Jfarm on 07/08/2017

    I bought this product from a local plant store and it seems to work good enough. I mixed a few ounces into my sprayer and within a few days I noticed some of the green brush turn brow. My only issue is that now I have to take up and acre of weeds that just killed and they didn't kill them down to the root. I didn't use soap, as it didn't specify this on the bottle, so I may re-spray. So of these reviews claim their yard turned to dirt, but I've got a whole yard full of brown weeds now. Not sure if I can just plant some wild flower seeds after using kill all, but I figure the dead stuff won't help when their a foot tall dead mess. Good product anyway, it seems to have killed most of the yard.

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    4 of 6 people found this review helpful

  • 3 of 5 Stars

    Its ok

    By Chris on 05/18/2018

    It works, but I had to do it twice. I mixed as listed on the label and it didn't work. I added more to the constancy of water then it worked. It did not kill the weed quickly, it took about a day or so for them to start dying.

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    0 of 1 people found this review helpful

  • 3 of 5 Stars

    KILLZALL

    By John on 06/28/2018

    it took a long time for it to work. i have applied two applications, one at 2% and then one at 5% it still has not killed all the weeds. it kills most things especialy grass like burmuda but takes two applications at 5% to kill monkey grass. location is N W FLORIDA. i need a large quantity of burmuda grass seed please contact me if you have any info at email below

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  • 3 of 5 Stars

    Confusing mixing instructions

    By Leslie on 06/12/2020

    My husband was really confused on the mixture rate, but it did eventually work slowly. It didn't work the first time around.Had to go back over areas twice.

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  • 3 of 5 Stars

    Killzall weed and grass killer

    By Jesus on 05/17/2024

    Works OK on the weeds have to use way more than recommend. It works great on the grass

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  • 3 of 5 Stars

    OK product with a major ‘except for’

    By Fred on 03/28/2025

    One of the main reasons I bought this particular product was that it was cheaper than other products like it since the recommended amount per gallon was far smaller. Simply put the recommended amount per gallon is ineffective at killing weeds even with temperatures in the high 70s

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    0 of 1 people found this review helpful

  • 3 of 5 Stars

    Might have to adjust my expectations

    By John on 05/16/2025

    Roundup used to start killing in a couple hours and the next morning everything it touched was dead. This stuff is advertised as the original chemical but I am not sure. Yes it finally killed the weeds after a couple weeks but it took two applications and a doubling of the strength on the second application. It might have worked without the second application but after a week staring at green weeds I was just not feeling that it would.

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    1 of 2 people found this review helpful

  • 3 of 5 Stars

    Slow action

    By Michael on 07/27/2026

    At the recommended mix ratio, it’s taken 4 days after application before I began to see any results. So it appears to be working but don’t expect quick results.

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    1 of 1 people found this review helpful

Displaying 1 to 30 (of 204 reviews)