Powerful herbicide that kills poa trivialis
By John on 05/01/2020
I thought that this product was overpriced until I read the directions and realized how little is required per gallon. After application, I waited 2 weeks and the poa trivialis is definitely dying. I will make a second application today and use a pre-emergent next spring to hopefully contain this monster.
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2 of 3 people found this review helpful
Johnson grass
By Brandon on 10/02/2020
I had a ton of johnson grass coming up through sod that was installed 2 months prior. The johnson grass was in the yard that wasn't killed prior,I was too impatient. Anyways this product completely got rid of it. I would highly recommend this product. Surprisingly the grass actually did really well no stress appeared. It also did very well on the nut grass
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2 of 2 people found this review helpful
Great Transaction
By Becky on 10/25/2019
Not quite what I expected
By Rob on 07/22/2023
First, I want to say that I really like dealing with DoMyOwn, but this product has been a letdown. I was in a chat about Poa in my lawn, and bought a pre emergent for use this fall. I do admit that the person I was chatting with said that using pre emergent was The Best way to deal with it. I asked about anything else that could be done, and they said there is this product call Certainty that can be used Post Emergent, so I bought some. It's about $129 for 1 1/2 ounces of powder. I mixed it according to directions and sprayed it on a couple test patches. Not much happened with the first application for about 10 days, so I reapplied. I think I would have been better off with Roundup. It totally kills Poa, but no one can tell me if I can now reseed these areas or if they are barren for six months. So I have horrible dead patches in the lawn, still have 95% of the Certainty left, and am left wondering if anyone should ever use this on a residential lawn......it's a big waste of money. Use Pre Emergent in the fall!
Expert response:
You may notice signs of the poa 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. According to the product label, you should wait at least 3 weeks before re-seeding or over-seeding after application.
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1 of 1 people found this review helpful
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.
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1 of 1 people found this review helpful
Johnson grass
By Randy on 10/27/2023
I used certainty on what I would call Johnson grass broad leaf grass that growers a stem of seeds.the stuff was expensive so I put 3 little scoops about half a teaspoon in 2 gallon of water in a back pack sprayer about 3 weeks ago in Oct. Spayed where ever I saw it heavy in some areasnd had just enough to cover all the areas,all dead! I'll have to spray again next year when I see before it seeds,but I have several years of product left.sprayed it on a burmuda grass called celebration no damage.
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1 of 1 people found this review helpful
Poa annual
By Jason on 03/22/2024
Took two applications for burn weed
By Matt on 06/06/2025
Johnson weed killer
By Butch on 07/31/2020
Knocks 'em dead
By Larry on 05/14/2022
Still waiting to see...
By Rhoda on 03/24/2023
I bought Certainty to take care of the poa annua that was trying to take over my yard. I have bermuda grass and after testing the soil temperature to make sure the bermuda was still dormant, I sprayed my lawn and 5 feet into my neighbor's yard. Now it's wait and see since getting rid of poa annua is not an overnight process. I just want to prevent it from going to seed.
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0 of 1 people found this review helpful
CERTAINTY HERBICIDE
By Bill on 09/27/2020
