Grass Out Max (Clethodim Herbicide) - Questions & Answers

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  • Asked by Sue from Sparta, Michigan
    06/07/2015
    Q
    I used Grassout on April 16. Would it still affect warm season grasses like switchgrass that I want to cone u
    A
    Grass Out Max (Clethodim Herbicide) is a post emergent herbnicide and should not effect the warm season grass now.
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    1 of 2 people found this answer helpful.
  • Asked by Joseph from Richmond Hill
    03/21/2017
    Q
    Will Grass Out Max (Clethodim Herbicide) hurt my centipede grass?
    I have bermuda grass and bahaia grass in my lawn that I want to eradicate.
    A

    Since Grass Out Max (Clethodim Herbicide) is a grass killer in general we do not recommend you try to broadcast spray it over your centipede lawn as it may cause damage. 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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    1 of 9 people found this answer helpful.
  • Asked by Kris from Knightdale, Nc
    07/22/2017
    Q
    How much Grass Out Max should I use per gallon of water to control poa annua?
    I would like to kill poa annua in my Bermuda grass lawn.
    A

    Grass Out Max (Clethodim Herbicide) can eradicate Bermuda and Poa Annua. Revolver Herbicide is a post-emergent herbicide that is labeled to kill poa annua in Bermudagrass. Be sure to apply this product in temperatures above 60 degrees Fahrenheit. The mixing ratio is 0.2-0.4 fl. oz. per 1000 square feet. This will generally mix in a gallon of water.

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    1 of 3 people found this answer helpful.
  • Asked by Angie from Bakersfield, Ca
    02/18/2018
    Q
    Will Grass Out Max kill poa that is growing in rye grass that also has dormant Bermuda?
    I live in Bakersfield where we overseed our Bermuda grass with Rye each winter.. The Rye has Poa growing in the shaded areas of lawn. If i spray it now over Rye/Poa will the Bermuda be safe? And is it pet safe once dry?
    A

    Grass Out Max (Clethodim Herbicide) is a grass killer and would kill both the rye and the bermuda.  To kill poa annua in rye grassm, you would need to spot treat with a glyphosate based product such as Gly Pho-Sel Pro.  These grasses are closely related so there is no selective product label to kill one that would not also kill the other.  If you still see poa once the Bermuda is no longer dormant, you can use a product like Certainty.  

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    1 of 2 people found this answer helpful.
  • Asked by Cessilee from Preston, Id
    04/20/2018
    Q
    How soon after application of Grass Out Max (Clethodim Herbicide) in flower beds would it be safe to plant annual plants?
    A

    You should not plant any crop for 30 days after application of Grass Out Max

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    1 of 1 people found this answer helpful.
  • Asked by Daniel from Atlanta, Ga
    05/16/2018
    Q
    Can I use Grass Out Max to kill poa annua in my bermuda grass?
    A

    Grass Out Max is a grass killer and would likely kill the bermuda along with the poa annua.  To target poa anuua in bermuda, you may want to consider using Certainty Herbicide instead as it will not harm the bermuda grass. 

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    1 of 2 people found this answer helpful.
  • Asked by Nancy from Sedan, Ks
    06/15/2018
    Q
    If I mix Grassout one day can I use it the next day and it be just as effective?
    A

    You should use diluted Grass Out Max (Clethodim Herbicide) within 24 hours of it being mixed.

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    1 of 1 people found this answer helpful.
  • Asked by Lurley from Galena
    07/10/2018
    Q
    Will Grass Out Max kill sedge?
    A

    Grass Out Max will not kill sedge.  We would recommend using a product like Dismiss instead.  

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    1 of 2 people found this answer helpful.
  • Asked by Tony from Crowley, La
    08/10/2018
    Q
    Can Grass Out Max be used to kill dog fennel weeds?
    A

    Grass Out Max is not labeled for dogfennel.  You may want to consider something like Fertilome Weed Free Zone instead.  

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    1 of 1 people found this answer helpful.
  • Asked by Debbie from Ellicott City, Md
    09/03/2018
    Q
    Does Grass Out Max (Clethodim Herbicide) hurt ferns?
    A

    Grass Out Max (Clethodim Herbicide) lists asparagus fern as a tolerant species on the product label.  To see whether it may be safe for other species, we suggest contacting the manufacturer directly to see what they recommend.  You can reach Agrisel at 877-247-4735.  

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    1 of 1 people found this answer helpful.
  • Asked by Joyce from Cambridge, Id
    09/08/2018
    Q
    Will Grass Out Max (Clethodim Herbicide) kill Canadian and Bull Thistle? If so, when is the best time to spray?
    I have tried many different products, organic and not, and the thistles keep coming back year after year. Even tried digging them out and that just seems to make the thistles multiiply the following year. Recommendations?
    A

    Grass Out Max (Clethodim Herbicide) is not labelled for Canadian & Bull Thistle. Tenacity Herbicide is labelled to treat Canadian Thistle, but doe does not list Bull Thistle. Herbicides containing glyphosate like Roundup QuickPro can effectively control bull thistle. Mowing may need to be repeated throughout the season to prevent reflowering

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    1 of 1 people found this answer helpful.
  • Asked by Rick from Mathews, Va.
    03/21/2019
    Q
    Can Grass Out Max (Clethodim Herbicide) be used on clover in Virginia without harming the clover?
    A

    Grass Out Max would not harm clover but it is currently only labeled for use on clover when used in the states of Idaho, Oregon, and Washington.  Arrest Max contains the same active ingredient but does not have any state restrictions for clover.  

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    1 of 1 people found this answer helpful.
  • Asked by Justin from Olpe
    04/17/2019
    Q
    Can Grass Out Max (Clethodim Herbicide) be used on clover food plots without killing the clover?
    A

    Grass Out Max would not harm clover but it is currently only labelled for use on clover when used in the states of Idaho, Oregon, and Washington.  Arrest Max contains the same active ingredient but does not have any state restrictions for clover.  

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    1 of 1 people found this answer helpful.
  • Asked by Pat from Myrtle Point Or
    04/30/2019
    Q
    How long after spraying Grass Out Max in my strawberry bed can I harvest and eat the berries?
    A

    Per the product label for Grass Out Max (Clethodim Herbicide): The minimum time from application to harvest is 4 days on strawberry.  Be sure to rinse well before consuming

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    1 of 1 people found this answer helpful.
  • Asked by Jerry from Villa Rica, Ga
    06/27/2019
    Q
    How tall can crabgrass get before Grass Out Max out won't kill it.
    A

    Per the product label, crabgrass should be between 2-6 inches in height when applying Grass Out Max.

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    1 of 1 people found this answer helpful.
  • Asked by Donald from Knightstown, In
    08/04/2019
    Q
    Can Grass Out Max be used around blackberries?
    A

    Grass Out Max (Clethodim Herbicide) is not labeled for application around Blackberries.

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    1 of 2 people found this answer helpful.
  • Asked by Jeff from Ct
    04/22/2021
    Q
    If killing the old grass and replanting new grass seed, will Grass Out Max (Clethodim Herbicide leave a residual in the soil that will prevent new grass seed from germinating?
    I'm looking for a quicker way to kill the existing grass so the tiller process can be quicker. If this does leave a residual in the soil, can I add 1 or 2" of fresh soil on top that will help the new grass seed germinate?
    A

    If you are looking to kill all existing grass/plants in an area so that you can reseed with a new or different type of grass, the best way to do this is with any Roundup or non selective type product. Roundup and similar items on the market like X-Out and Avenger will will burn down the existing vegetation and break down in the soil within 1-2 weeks to allow you to replant without fear of damage to the new seed.

    Grass Out Max would require you wait at least 30 days after an application before planting new seed. If you wanted to bring in fresh soil that does not have chemical residual in it you are welcome to do that. 

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    1 of 1 people found this answer helpful.
  • Asked by Kevin from Alton, Va
    05/04/2021
    Q
    Will Grass Out Max (Clethodim Herbicide) kill onion or beet if sprayed on them?
    A

    No, Grass Out Max (Clethodim Herbicide) is meant to control annual or perennial grasses that may grow in or around onion and beet crops. 

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    1 of 2 people found this answer helpful.
  • Asked by Ann from Eugene Oregon
    04/16/2012
    Q
    Please provide names of 50 plants that Grass Out Max kills
    I only want to kill grass but understand there are common plants that belong to the grass family. I want to know the names of them.
    A
    All 50 plants are named on the Grass Out product label starting on page 18. We have linked the product label in our answer but it is also available on our website on the Grass Out Max page under the picture of the product.
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  • Asked by Meryl from Silver Spring, Maryland
    03/24/2013
    Q
    Would Grass Out Max be effective in controlling bamboo?
    We will be trying several techniques, including a non-selective herbicide but I would prefer to use a grass herbicide because other plants in the area would be affected by non-selective herbicide.
    A
    Grass Out Max will not be effective for Bamboo. Only non-selective herbicides applied at the highest usage rate directly to cut stumps multiple times has been proven to be effective for eliminating bamboo.
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Displaying 81 to 100 (of 162 questions)