Didn't work on my lawn
By Jason on 04/18/2017
Certainty herbicide
By Donald on 05/09/2017
Didn't do anything to Quackgrass
By Sharon on 11/01/2021
I have a couple patches of quackgrass and this was recommended on multiple websites. From reviews, the quackgrass should have started browning in a week. It has not, in fact it appears to be flourishing. I am going to give the second treatment in a few weeks. Maybe I will see something after that.
Expert response:
You may notice signs of the quackgrass dying (discoloration-yellowing or browning) within 2-3 weeks after you have applied Certainty but it is normal not to see anything for at least a month. Per the product label, you can make an additional application 4 or more weeks after the initial application as needed. Best results are obtained when target weeds are actively growing & not disturbed by mowing for at least 2 days before and 2 days after application. Warm, moist conditions following application will accelerate activity; cold, dry conditions will delay activity. Drought stressed weeds are less susceptible.
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