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Compare to Select 2EC and Arrow 2EC Herbicide. With Grass Out Max you get the same active ingredient for less expense. It is highly recommended that you use a surfactant with this product.
Grass Out Max is a selective post-emergent herbicide used to control annual and perennial grasses. It is labeled for most landscape, home and garden, ornamental, agricultural and non-crop uses. 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. Grass Out Max contains 25.4% Celthodim Herbicide and effectively kills more than 50 different grasses.
Grass Out Max is only labeled for use on clover when used in the states of Idaho, Oregon, and Washington.
|Active Ingredient:||Clethodim - 25.4%|
|Target pests:||Barnyard grass, Cheat grass, Canary grass, Crabgrass (hairy, large, smooth, southern), Foxtail, Goose grass, Rye grass, Annual Blue grass (Poa annua), and many others
Will Not kill Flowers, Shrubs, Broad-leaf Crops or other Broad-leaf Plants
See label for complete list
|For use in:||Landscape, Home and Garden, Ornamental, Agricultural and non-crop areas
* See label for complete list
|Application:||16 oz. per acre
Add a crop oil containing 15% emulsifier at 1 qt. per acre
* Use a Surfactant to Increase Effectiveness
* See label for complete application instructions
|Shipping Weight:||2.28 lbs|
Use a minimum of 5 gallons and maximum of 40 gallons of spray solution per acre. Use of sufficient spray volumes and pressure is essential to ensure complete coverage.
Under the following conditions a minimum of 10 gallons per acre is required: narrow row soybeans, broadleaf herbicide tank mixes, perennial grasses, volunteer corn, drought or stress conditions heavy grass pressure or when grasses are at or near maximum height. Failure to use a minimum of 10 gallons per acre under these conditions can result in poor coverage and reduced grass control requiring repeat applications. Spray pressures should reflect a minimum of 30 psi and a maximum of 60 psi at the nozzle. Do not use flood nozzles.
Applications to onions (dry bulbs and green), garlic, and shallots (dry blubs and green) should be made in a minimum of 20 gallons of spray solution per acre.
See all 20 reviews »
19 of 20 people found this review helpful:
Good grass killer
By Joseph in Saint Johns on 08/04/2014
I purchased this product to use on my food plots. It arrived timely, and I mixed the product with 2.5 oz per gallon of water. I mixed in some sticker as indicated, and used a backpack sprayer to apply. I didn't see any immediate action (first couple of days) but finally noticed that it was working. It took out the crab grass in my clover field without harm to the clover. My plots are about 1/3 acre; I would suggest that you map out a route to insure complete coverage if you use hand sprayer like I did, as I missed a few spots do to walking deviations. I recommend this product for use in food plots.
17 of 23 people found this review helpful:
Grass Out Max
By Mike in Charlotte, MI on 06/20/2012
I have used other products of this type meant specifically for grass eradication and this product was the least effective.
14 of 15 people found this review helpful:
Takes Patience, But Very Effective
By Happy in Utah on 09/29/2012
We have about 12000 square feet of lawn with curbing and beds throughout. Kentucky bluegrass creeping into the groundcover of the beds used to be a real problem. Then my neighbor introduced me to to Grass Out Max. He had used it the previous fall and his beds look great. He said it took about a month for it to work. I tried it and it and for the first couple of weeks didn't see much difference, but after a month it did the trick. Now just an occasional touch up application keeps the beds looking good.
8 of 8 people found this review helpful:
By Rusty in los Angeles CA on 01/12/2015
I don't think the product works. I have applied it twice and at this point no action. unless it kills the grass soon it was wasted money.
What kind of plants are you trying to kill, and around which desirable plants? This product should be used with a surfactant, so you will only see limited results if you have applied it without adding a surfactant/spreader sticker to your diluted solution. You may also see limited or slower results during this time of year since the grass should be actively growing in order to absorb the herbicide. We would be happy to troubleshoot with you via email or via telephone at 866-581-7378 9a-5p EST.
7 of 8 people found this review helpful:
Grass Out Max
By Jon in Pennsylvania on 09/09/2013
I'm very pleased with the product. Grass out max work as advertised. Definitely will purchase again and will try other products.
By Andrew in Purcellville, VA on 08/04/2017
This product does what it says! Kills grass and nothing else. My strawberry patch is happy!
Grass out max
By Jason in Laura, IL on 07/21/2017
Shipping could not have been faster!! I applied grass out max at 16oz per acre with surfactant on my clover. Seven days later grass turned yellow three more days it was dead.
By Ddwag in West lafayette, in on 07/08/2017
got r dun, killed the grass near my maters
2 of 2 people found this review helpful:
Grass Out Max
By Betty in Salt Lake City on 06/01/2017
I barely applied the product and cannot say yet how effective it is. The product information booklet is extensive, but never states how many ounces to a gallon sprayer for use in home perennial beds. It says 8 oz. for an acre. I am guessing 1/2 oz./gallon for home use, but guessing is uncomfortable.
Thank you for your review. I apologize that the label is extensive and confusing. We recommend using a surfactant like Non-Ionic Surfactant to help increase the efficacy of this product. If you use the surfactant, the recommended mixing rate for one gallon would be 2 tsp of surfactant with approximately .4 oz of the Grass out per gallon of water per 1,000 sq feet. Please let us know if you have any other questions.
0 of 1 people found this review helpful:
food plot grass
By Bill in Kaiser, MO on 03/30/2017
Bought this last winter so I'd have it when warm weather hit and the grass started growing again, Grass has been growing for about 1 month now, sprayed 3 times and grass is still green and going strong. I won't say don't buy this product because it might work for you, but I wouldn't buy it again or recommend it . Its been a waste of my time and money.
Thank you for your comments! You did not mention whether you used a surfactant when applying the Grass Out Max. You are very unlikely to get satisfactory results using Grass Out Max or other clethodim products with the addition of a surfactant, such as Southern Ag Non-Ionic Surfactant for Herbicides: http://www.domyownpestcontrol.com/nonionic-surfactant-for-herbicides-p-1771.html We appreciate your feedback and your business!
1 of 1 people found this review helpful:
Worked like a charm!
By Clay in New Salisbury, IN on 08/25/2016
I was a slight bit biased on purchasing Grass Out Max when comparing the price to the other big names out there. I thought it was worth a shot for controlling the grass takeover in my strawberry bed. One application on a dry hot day was all it took! Less than a week and the color turned and all the grass was dead.
1 of 6 people found this review helpful:
Didn't work for me.
By Robert in Kansas City on 08/24/2016
Save your money.
By K in Pikevill, KY on 07/13/2016
I wasn't sure how well this would work. Killed the grass in the wife's flowers and in a patch of crimson clover. It took about two weeks to start seeing results. Everything looks pretty good. Product arrived quick.
0 of 2 people found this review helpful:
Didn't touch my problem
By Brian in Lomira, WI on 06/16/2016
My soybeans are being overtaken by grass. I tried spraying twice and this stuff hasn't worked at all.
3 of 3 people found this review helpful:
Resurrected food plot
By Les in Bathgate, ND on 06/05/2016
followed recommended dosage on 1 acre alfalfa food plot that grass was threatening to take over. after only about 5 days grass going, going, and a few more days gone! Alfalfa came back strong and looks great now!
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08/08/2011 Kim from Knoxville Tn
QWhat 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?
AYou 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.
05/07/2014 Therese from Swanton, Ohio 43558
QI 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.
AIf 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.
QCan Grass Out Max be used on clover without killing it?
AThe 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.
06/17/2014 Roy from Metairie, La.
QDo 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?
AThe 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.
03/06/2015 Matt from Mchenry, Il
QWill Grass Out Max harm pumpkin & gourd plants?
ANo, Grass Out Max is labeled to be used around pumpkin and gourd plants.
09/28/2016 Tom from Madison Wi
QCan 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.
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.
08/15/2016 Terry from Lyons, Ga
QHow long do I have to wait to plant mustard and turnips after applying Grass Out Max?
A You should not plant any crop for 30 days after application of Grass Out Max.
You should not plant any crop for 30 days after application of Grass Out Max.
07/11/2016 Holly from Atlanta, Ga
QWill Grass Out kill Zoysia that is growing in Mondo Grass and Euonymous, without harming them?
A Grass Out Max (Clethodim Herbicide) would not harm ground covers like Mondograss and Euonymous when used as directed on the product label. It is not labeled to kill zoysiagrass so we cannot recommend it for this use. Typically a glyphosate based product would be used to control it in these areas with care being taken to avoid contact with desirables.
Grass Out Max (Clethodim Herbicide) would not harm ground covers like Mondograss and Euonymous when used as directed on the product label. It is not labeled to kill zoysiagrass so we cannot recommend it for this use. Typically a glyphosate based product would be used to control it in these areas with care being taken to avoid contact with desirables.
05/25/2016 Bill from White House, Tn
QDoes Grass Out Max kill weeds/grasses in an iris bed without killing the iris?
05/24/2016 D from New Market, Va
QHow 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.
You would see results with Grass Out Max within 10-14 days.
01/28/2016 Al from Camarillo
QWill Grass Out Max kill my rose bushes?
Annual blue grass is invading my rose bush planters.
A Grass Out Max (Clethodim Herbicide) is a great choice for killing annual blue grass (poa annua) in ornamental beds as long as the non-target plants are well established. Per the product label, be sure to use a non-ionic surfactant with at least 80% active ingredient, although crop oil surfactants are not recommended around flowers to prevent sensitivity. Please review the product label before application. If you are only experiencing problems in planters, then you may need to examine whether weeds are coming up from the ground below them, in which case you should move and/or add a barrier under or inside the planters. Transplanting or changing the potting soil would also ensure no new growth of unwanted plants.
Grass Out Max (Clethodim Herbicide) is a great choice for killing annual blue grass (poa annua) in ornamental beds as long as the non-target plants are well established. Per the product label, be sure to use a non-ionic surfactant with at least 80% active ingredient, although crop oil surfactants are not recommended around flowers to prevent sensitivity. Please review the product label before application. If you are only experiencing problems in planters, then you may need to examine whether weeds are coming up from the ground below them, in which case you should move and/or add a barrier under or inside the planters. Transplanting or changing the potting soil would also ensure no new growth of unwanted plants.
01/28/2016 Al from Camarillo
QWill Grass Out Max also kill the sod where I am trying to kill annual blue grass invading my lawn?
would like to kill the blue grass invading my sod grass
A While you did not state what kind of grass is in the sod that you have down, the Grass Out Max is specifically designed to kill any and all grasses it is sprayed on and ONLY kill grasses. This would not be a product you would want to use over a sod lawn and instead you would want to go with a product that is selective in either a pre or post emergent form. If you let us know what kind of lawn/sod you have, we can find a product that would better suit your needs.
While you did not state what kind of grass is in the sod that you have down, the Grass Out Max is specifically designed to kill any and all grasses it is sprayed on and ONLY kill grasses. This would not be a product you would want to use over a sod lawn and instead you would want to go with a product that is selective in either a pre or post emergent form. If you let us know what kind of lawn/sod you have, we can find a product that would better suit your needs.
06/07/2015 Sue from Sparta, Michigan
QI used Grassout on April 16. Would it still affect warm season grasses like switchgrass that I want to cone u
AGrass Out Max (Clethodim Herbicide) is a post emergent herbnicide and should not effect the warm season grass now.
05/22/2015 Brooks from Columbia City, In
QI use 40 gallons of water to spray a food plot, how many oz per gallon of Grass Out Max should I use?
05/11/2015 Terry from Covina, Ca
QHow long should I avoid watering or rain?
AGrass Out Max (Clethodim Herbicide) should be rainfast within 4-6 hours after application.