Grass Out Max (Clethodim Herbicide) - Questions & Answers

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  • Asked by Therese from Swanton, Ohio 43558
    05/07/2014
    Q
    I purchased 'Grass Out' from you and it recommends adding a non-ionic surfactant,
    I need to know how much to use of the Grass Out and the Surfactant. Do you mix it together and what is the percentage of each. Thank You.
    A
    If you are using Non Ionic Surfactant you would mix 2 tsp per surfactant with approx. .4 oz Grass out in one gallon water over 1000 sq feet. Please let us know if you have any more questions.
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    58 of 67 people found this answer helpful.
  • Asked by Kim from Knoxville Tn
    08/08/2011
    Q
    What is the mixing ratio of Grass Out to water for spraying flower beds?
    I'm using Grass Out Max in a gallon sprayer for flower beds. In reading the labels, I can't find what amounts of grass max/water to use for that size container. Could you please give me that information?
    A
    You will need to use 0.2-0.4 fl oz of Grass Out per 1,000 sq ft area. Like most other herbicides the exact amount of water you use is not important, it is just important to make sure you get the specified amount of product over a 1,000 sq ft area. For ease of mixing/measuring you can add the specified amount of product to 1 gallon of water to apply to a 1,000 sq ft area.
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    50 of 151 people found this answer helpful.
  • Asked by Terry from Covina, Ca
    05/11/2015
    Q
    How long should I avoid watering or rain?
    A
    Grass Out Max (Clethodim Herbicide) should be rainfast within 4-6 hours after application. 
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    45 of 50 people found this answer helpful.
  • Asked by Michael from San Diego, Ca
    03/13/2017
    Q
    Can Grass Out Max (Clethodim Herbicide) be used as a spot treatment in flower beds?
    I have completely read the product label and the answer to "per gal.concentrations" questions which will not do! I have a garden with irregular shaped flower beds where it is impossible to estimate 1000 square feet for the amount of 0.2-0.4 oz. Grass Out Max. Like most people in my situation I will be SPOT SPRAYING throughout these beds. How much per gallon is necessary for an effective concentration to kill on contact regardless of the area covered?!!!
    A

    There is an applicaiton ratio for spot treaments on the product label for Grass Out Max (Clethodim Herbicide) as well. You would mix .33 oz - .65 oz. per gallon of water. 

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    40 of 44 people found this answer helpful.
  • Asked by D from New Market, Va
    05/24/2016
    Q
    How long does it take before the grass dies with Grass Out Max?
    A

    You would see results with Grass Out Max within 10-14 days.

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    38 of 41 people found this answer helpful.
  • Asked by Roy from Metairie, Louisiana
    06/17/2014
    Q
    Wiil grass out hurt sunflowers?
    A
    No, the unique feature of Grass Out Max is that it will ONLY kill grasses and NOT effect flowers, shrubs, broadleaf crops or other broadleaf plants.
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    20 of 22 people found this answer helpful.
  • Asked by Michael from Kissimmee, Fl
    10/19/2014
    Q
    I need to remove zoysia from asiatic jasmine.
    The two are growing next to eachother and the zoysia is popping up all through the jasmine. Will this product kill the zoysia and leave the jasmine? How much product to a 4 gallon sprayer?
    A
    Grass Out Max (Clethodim Herbicide) will not harm the  Jasmine as long the application is per label. Jasmine has been tested and it tolerant of this product.
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    17 of 25 people found this answer helpful.
  • Asked by Tom from Madison Wi
    09/28/2016
    Q
    Can Grass Out Max be used on grass in asparagus without killing the asparagus?
    A

    Yes, Grass Out Max is labeled to be used in and around asparagus. It will take care of the grass that is growing there, but will not harm the plants themselves.

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    17 of 18 people found this answer helpful.
  • Asked by Joshua from Georgetown
    02/26/2018
    Q
    Grass Out Max (Clethodim Herbicide) effects on bermuda?
    Will this product kill or harm my bermuda if I'm targeting poa annua?
    A

    Grass Out Max (Clethodim Herbicide) is a grass killer so will harm bermuda.  It is not meant to be used in lawns for weed control but more in croplands, ornamental plantings, etc.  To control poa annua in Bermuda you should use something like Certainty which will not harm your lawn.

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    16 of 17 people found this answer helpful.
  • Asked by Jeff
    07/11/2011
    Q
    Can Grass Out Max be used on clover without killing it?
    A
    The product label for Grass Out Max does say it can be used on clover, but only in the states of Idaho, Oregon, and Washington.  We are not sure exactly if you live in these states. Please refer to the label for specific application instructions.
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    13 of 28 people found this answer helpful.
  • Asked by Roy from Metairie, La.
    06/17/2014
    Q
    Do I need to add ammonia sulfate when mixing with hard water?
    There's a reaction when mixing glysophate with hard water that stops it from working. Ammonia sulfate stops this reaction. Is grass out act similar to glysophate when mixing with hard water?
    A
    The active ingredient in Grass Out Max, Clethodim, is not generally affected by hard water, so you should not need to use water additives. However, if the pH level of your water is higher than 7, then you may want to decrease the pH level for best results.
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    12 of 14 people found this answer helpful.
  • Asked by Matt from Mchenry, Il
    03/06/2015
    Q
    Will Grass Out Max harm pumpkin & gourd plants?
    A
    No, Grass Out Max is labeled to be used around pumpkin and gourd plants.
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    11 of 11 people found this answer helpful.
  • Asked by John from Chase City, Va
    04/15/2014
    Q
    I have clover food plots that I want to kill grasses in, with Arrow 2EC kill the grass and NOT kill the Clover
    A
    We are not familiar with Arrow 2EC. We would recommend using Grass Out Max over clover plots. It will not harm the clover or deer.
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    11 of 12 people found this answer helpful.
  • Asked by Pat from Moultrie Ga
    06/13/2013
    Q
    Will the Grass Out max kill day lilies?
    A
    Per the product label Day Lily have shown a tolerance to this product and should not be affected by an application.
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    9 of 11 people found this answer helpful.
  • Asked by Brooks from Columbia City, In
    05/22/2015
    Q
    I use 40 gallons of water to spray a food plot, how many oz per gallon of Grass Out Max should I use?
    A
    You will need to use 0.2-0.4 fl oz of Grass Out per 1,000 sq ft area. Like most other herbicides the exact amount of water you use is not important, it is just important to make sure you get the specified amount of product over a 1,000 sq ft area.
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    9 of 32 people found this answer helpful.
  • Asked by John from Colon, Michigan
    06/22/2014
    Q
    I need to kill clover in my strawberry patch.
    I have your grassout max to kill grass in strawberries. (have not used yet) Clover is the biggest problem I have. I need a product to kill clover and not my strawberries, but I think I ordered the wrong product.
    A
    We apologize, we are having a hard time finding a product that will kill clover and is safe to use over strawberries. We recommend to contact  your Cooperative Extension office and to speak with the Master Gardener. They will be able to assist you with the best treatment in your area.
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    9 of 18 people found this answer helpful.
  • Asked by Agge from Youngsville
    07/31/2017
    Q
    How do you convert fluid oz. per acre for Grass Out Max?
    I purchased Grass Out Max to treat goose grass in my yard however the application instructions only indicate fluid oz. per acre. How do I convert that so I can use the appropriate mixture in a 1 to 2 gallon tank sprayer?
    A

    Herbicides are a lot different than other concentrated products and can be hard to understand at first. The application rate depends on the speed at which you apply the product and the output of your sprayer. The amount of water used to apply Grass Out Max herbicide is not critical, but should be sufficient for uniform coverage of the target area. Calibrate by determining the volume of water required to treat 1,000 square feet. Use this calibration volume to determine the amount of water and Grass Out Max herbicide needed to treat the target area (see the following calibration example). Note: Sprayer calibration (volume of spray needed to treat 1,000 square feet) will vary with each individual operator.

    Steps in Calibration:
    1. Mark an area of 1,000 square feet (i.e. 20 by 50 feet or 25 by 40 feet).
    2. Place the sprayer on a level surface and add water noting the final level of water in the spray tank.
    3. Spray the marked area with a sufficient volume of water to provide uniform coverage. Refill the sprayer to the same level as before measuring the amount of water added. The measured water added to the sprayer is the volume needed to cover 1,000 square feet.
    4. Determine the application rate (0.073- .55 fl. oz./1,000 sq. ft.) for Grass Out from the Recommendations section of this label.
    5. To each volume of water used as measured in step 3, add the amount of Grass Out as determined in step 4.

    Example: If the sprayer uses 1 gallon of water to cover 1,000 square feet and the desired application rate of Grass Out is .55 fluid oz./1,000 square feet, then you would add .55 fluid ounces of Grass Out to every 1 gallon of water to be used.

    Grass Out Max per the product label is for use at the rate of 8 - 16 oz per acre to control goosegrass. So thats 0.18 - 0.36 oz per 1000 sq/ft mixed into the water volume you calculated from the test above. Grass Out Max also requires the use of a Non Ionic Surfactant which you will use at its labeled rates which are normally close to 1-2 teaspoons per gallon of water. 

    Keep in mind: Grass Out Max should NOT be used on home lawns or any areas where there is desirable turf grass. This is a GRASS killer and is to be used to remove grasses of almost every type from ornamental beds, around flowers and other labeled tolerant areas. 

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    8 of 10 people found this answer helpful.
  • Asked by William from New London, Nh
    03/08/2013
    Q
    Can Grass Out Max be used to control unwanted grass in spreading juniper beds?
    A
    Grass Out Max can be used in Juniper beds to control grass. Be sure to read and follow the product label for best results.
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    8 of 9 people found this answer helpful.
  • Asked by Bill from White House, Tn
    05/25/2016
    Q
    Does Grass Out Max kill weeds/grasses in an iris bed without killing the iris?
    A

    Yes, Grass Out Max can be applied in an iris bed without harming the iris if applied according to the instructions on the product label

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    8 of 9 people found this answer helpful.
  • Asked by Harry from Red Lion Pa.
    06/15/2013
    Q
    Can Grass Out Max be used on sweet corn?
    A
    Grass Out is not labeled for use on corn because corn is from the grass family and it could injure the corn. We recommend consulting with your local department of agriculture for the best product to use for weed control around sweet corn.
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    8 of 12 people found this answer helpful.
Displaying 1 to 20 (of 128 questions)