Good but a bit slow
By Charles on 08/30/2016
Another product, like Metsulfuron, that I use to remove cool season grasses from Bermuda, but which also works on sedges, and is similarly slow like Metsulfuron. Wait a week or two in spring and the poa will die off. Together with AmTide in the same bottle with surfactant, you can eradicate fescue and poa. When mixed with MSMA later in summer, it will really knock out dallisgrass, though you could just get rid of dallis with only MSMA. It comes with a little measuring spoon in the box to help you get the right amount per gallon of water.
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10 of 12 people found this review helpful
So far Certainty Herbicide is working!
By Joe on 10/20/2017
Kills nutsedge/cool season grasses
By Brandon on 11/14/2022
Bought this to take care of some of the cool season grasses invading my bermuda lawn along with a ton of yellow nutsedge. I did two applications mid summer at the minimum rate (probably could've done one at high rate) and after the second, the rye grass, fescue and yellow nutsedge were immediately fried. Mission complete. Highly recommend. May need two applications fyi.
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1 of 1 people found this review helpful
Certaninty Herbicide kit
By Mdx on 06/11/2023
Excellent Herbicide/Surfactant
By Steve on 08/12/2023
Certainty helped clear up a massive infestation of Yellow Sedge in my Bermudagrass. The surfactant obviously helped with penetration. However, I didn't find the blue indicator dye particularly useful in my residential application because I couldn't see it (medium concentration) and it makes a mess.