Customer Reviews for Grass Out Max (Clethodim Herbicide)

This is a herbicide that is specific to grass species. Does not harm most other types of plants. BUT read the very detailed instructions carefully!! Some (a few) ornamental plants could damaged by this Grass Out Max, and there is a comprehensive list in the instructions. I used this in flower beds/landscaping where invasive grasses like Bermuda were growing in and around desired ornamental plants. I have seen a pretty good kill of the grasses. However, my area was starting to get pretty dry when I sprayed. The instructions will tell you Grass Out Max is effective on actively growing grass, but not as effective on drought-stressed grass. I have a few areas I will have to respray after the grass gets some water. Two things to know: this Grass Out Max has to have time to travel through the grass blades (leaves) down into the roots. You won't see the grass dying for several days. Be patient, it's working. Second, shield adjacent lawn grass areas from the spray ( I sprayed with a 2 gallon tank garden sprayer), use a tarp or something similar. Remove right after you spray, and be careful not to allow the part of the tarp that has wet spray on it to drag over the grass. Overall very satisfied with results I got.

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I used a lawn company till this year, my problem has always been Poa Annu Bluegrass. bought this product appplied 1 oz per gallon with my hose end sprayer results were visible 2-3 days after use. Use a sufflant also. bought the smaller size this time but will buy the bigger next year for two applications at separate times. NO MORE LAWN COMPANIES WASTING MY TIME AND MONEY!

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Sprayed clethodim on my arrowleaf clover to kill thick bermuda and it did the job. As others have reported it takes 2-3 weeks. Bermuda was very thick and now it's beaten down and the clover should make a great plot on into fall.

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Worked extremely well but please be patient it could be 2 weeks before you see that it's working

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Although we are in the beginning stages of a drought, and the grass that needed spraying was stressed and tough, I decided to spray the my strawberries and around my blueberry plants. At first there did not seem to be any grass that appeared stressed. Then we got a quick shower and the younger grass began to yellow and then died. The older grass and Bermuda grass have begun yellowing. This means that the Grass Out spray is trans-locating to the roots and the yellow grass will die. Even long strands of Bermuda Grass which are growing out over gravel are yellowing and will ultimately kill the host plant to its roots. Grass Out is a great product that is deadly to grass and not harmful to my strawberry plants and to other broad leaf of the same type.

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Be careful it works maybe to well. Use when you are going to get rain use just as its tells you Works Great.

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I t trued everything to kill my weeds and I found out this protucts work the best I have over 25 years in horticulture flies with a degree

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Effective and reasonable price for grass control in clover food plots. Same active ingredient as Arrest Max.

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First off, the included pamphlets are very detailed and you might need to calculate the proper application for your situation. All that being said, I read a review that said to use 0.4 fluid ounces per gallon of mixture with 0.35 fluid ounces of a surfactant. This calculation was correct for my application once I worked out the proper rate from the pamphlets. I have an atv mounted 20 gallon sprayer that I use to spray food plots and around the house for all my needs. I needed this product to treat a field of sunflowers for wildlife on my property. I mixed the recommended rate that I received on this website and it really worked! All the field grasses were killed with the sunflowers looking not to be scathed. The product does take some time to work so don't expect a 24 hour turn around like some herbicides promote. It takes about a week to 10 days to work. I'm very happy with this product and this website to provide the insight into the specific application for my needs. I am now thinking to use this product on my flowerbeds and garden beds that get infested with grasses after I work so hard to prepare the areas. I'm going to research the provided pamphlets to ensure I'm mixing the correct dosage but this website does provide a valuable resource with their expertise.

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This has been an excellent product to kill grass that invades the Junipers and other plantings where grass does not belong. It is a little slow acting, but very effective at killing the grass, without harming the plant.

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Love this stuff for killing grass in my food plots. Customer service scores 100%. I had a package arrived damaged, and I called and it was fixed immediately.

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Tried Grass Out Max on newly planted alfalfa that had lots of grass. Took about 10 days to see results and it works really well. Also tried on Cowpeas and it is working on grass slowly. So far I am empressed with this product.

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Had Johnson grass try to take over my sunflower plot this spring, and the Grass Out Max used with Surfactant took care of the problem!

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I was have issues with brome, bermuda, and johnson grass popping up in a new pollinator planting and could not use glyphosate due to damage the seedling forbs would suffer. Someone experienced in land management told me about this product and so far it has not harmed the forbs. I mixed on the lower side but it seems to be doing the job.

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I could not keep up with grasses growing in my vegetable garden, especially difficult around my onions and garlic. I used Grass Out Max with 1 oz per gallon of water in a pump up sprayer with some surfactant and total kill of ALL grasses with no harm to vegetables. I'm a true believer.

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Got this product quick and it worked well to kill the grass that was growing in my clover foodplot I had planted for deer.

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Use with surfactant and at the recommended rate and it does the job

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Used this product to kill grasses in our Vinca Minor (Periwinkle) Ivy bed during mid-June NW Ohio, and in about 10 days the grasses were turning yellow and brown. Used Dawn dishwashing detergent as a surficant and gave them another shot on day 11. I would definitely buy again!

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works awesome when mixed properly takes a few days but kills the grass.

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I've tried a few other products to eliminate the grasses from beds of myrtle and other ground covers. Nothing seemed to work. After two applications of the Grass Out Max, the unwanted grasses are disappearing from view. The little bit of die-back in the perimeter lawn areas was not unexpected. I used a wetting agent to ensure good contact with the grass blades. Total success might not be evident for a couple of months, but results to date have been very positive.

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Worked very well has stopped growing it's been about six weeks good grass stomper

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I have used this product twice. The first time more as a test to see if it damaged recently planted clover. I choose an area in my yard where grass had completely taken over the clever. In about a week the grass turned yellow then dried out. The clover is starting to grow better. The second time was only four days ago. About half of the grass is yellow and the clover is looking good. I mixed a little more than an ounce to 5 gallons of water and some surfactant. I may spray again in a week.

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wont kill the grass as fast as Glyco but it did not harm the Clover and thats what I needed it to do

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Works as advertised. Added a surfactant and used in sunflower field. Took about 10 days to kill off grass

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Sprayed 12 Oz/Acre 8 hours before a 1/2 inch of rain and almost all grass in my food plot turned brown within 1 week. Remaining grass was brown and dead by the end of 2nd week. Plot was planted 4 weeks before application and has clover, winter peas, alfalfa and turnips which never showed signs of stress.

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worked great to kill grass without harming clover patch. Will us again. Great delivery. Price was very good.

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This product works well on POA. I will definitely purchase again.

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Does what it says. Perineal beds are over sprayed once in spring.... no grass weeds all summer. It's very effective and does kill ornamental grass so be careful... will not harm shrubs or other non grass plants.

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I sprayed 3 gallons via a backpack sprayer on my clover plot on 5-18 20. Was back out there today, 5-27-20, and the grasses were looking like there are heading for being dead. It is not an instantaneous kill but it is working like it should. The clover looks great with all the grasses dying out. I am very pleased.

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Quick shipment and delivery. Package was as described. I would recommend this company.

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