Certainty Herbicide - 1.25 oz.

$91.45

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4 out of 5 stars Rating: 4.1

14 Reviews | 69 Q&A

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Certainty Herbicide - 1.25 oz. bottle (1.25 oz)

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Certainty Herbicide - 1.25 oz.

Certainty Turf Herbicide is a selective, post-emergent herbicide that controls labeled weeds in residential and commercial turf.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

Only for use on the following warm season grass types: Bermdagrass (common or hybrid), Bahiagrass, Buffalograss, Centipedegrass, Kikuyugrass, St. Augustinegrass, Seashore paspalum, and Zoysiagrass.




Certainty Turf Herbicide controls tough weeds in residential and commercial turf.

  • In "warm" season turf, Certainty Turf Herbicide will control broadleaves, sedges and kyllinga.

Certainty Turf Herbicide is easy and flexible to use and has excellent control of both purple and yellow nutsedge. Combined with a non-ionic surfactant, Certainty Turf Herbicide attacks nutsedge through broadcast applications or spot treatments.

With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.

*Note: Certainty Turf Herbicide is not labeled for golf course putting greens or within 4 feet of the putting green.

Rating Snapshot

5 stars   9
4 stars   2
3 stars   1
2 stars   0
1 star   2

See all 14 reviews »

Average Customer Rating
4 out of 5 stars (14)

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  • 13 of 13 people found this review helpful:

    5 of 5 stars  Kills poa annua in centipede
    By Rich in Columbia, SC on 02/22/2015
    Verified Purchase

    After fighting poa annua for the last few years it is good to find something that works. It seems expensive for such a small amount of product, but the amount used per gallon of water is so small it is cost effective. Works much better than the atrazine I used before. Great product and produced results in only 2 weeks.

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  • 11 of 13 people found this review helpful:

    5 of 5 stars  It killed Johnsongrass!
    By in Southern Illinois on 07/01/2013
    Verified Purchase

    After trying many products to kill johnsongrass, tried Certainty and in 10 days the grass was dead!

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  • 9 of 10 people found this review helpful:

    5 of 5 stars  Quackgrass Dead On Arrival!
    By Ken in Indian Trail on 05/26/2016

    Used properly per instruction, quack grass started turning yellow on 3rd day, bright yellow by the 7 day, and wilting over 2 weeks out. Must use the Dyne Amic with this product. See my other review for (Drive) product. Newly planted Princess 77 lawn. Killed all the Quackgrass, the Bermuda kept smiling!

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  • 8 of 8 people found this review helpful:

    5 of 5 stars  Green Kyllinga in Florida St Augustine grass
    By Homeowner in Florida on 04/30/2014

    I applied Certainty to my St Augustine lawn in April. The St Augustine did not show any signs of stress. Kyllinga did not shrivel up and die the next day, but it did stop coming up in my lawn. I'm very satisfied. The rest of the 1.25 oz bottle should last me for years to come so it is cost effective in the long run.

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  • 7 of 7 people found this review helpful:

    5 of 5 stars  Awesome
    By Jeff in Montgomery, Alabama on 07/07/2015

    I had a bad infestation on nutsedge and we were getting a lot of rain everyday decided to mix it up and give it a shot in front of the rain one day only three hours before receiving half an inch of rain but within 7 days the sedge is already 90% dead. Well worth the money

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  • 5 of 6 people found this review helpful:

    5 of 5 stars  The best results ever!
    By Dennis in Leland, NC on 08/08/2015
    Verified Purchase

    This stuff really works. Results are slow, 2-3 weeks, but follow directions, use a good quality surfactant, and watch weeds disappear. Even with the blistering heat from this summer, no turf damage, no discoloration- except for the dying weeds, both sedge/grasses and broadleaf! In my centipede lawn, the best results I've ever achieved.

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  • 3 of 3 people found this review helpful:

    5 of 5 stars  Expensive but works well
    By Jim in Chadds Ford, PA on 05/12/2015
    Verified Purchase

    Effective at controlling quickgrass.

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  • 3 of 4 people found this review helpful:

    5 of 5 stars  Great product
    By Shareem in Fort Worth TX on 05/08/2016

    Certainty worked better than I expected . I used it to control Tall Fescue in my Bermuda during spring .It worked incredibly well ! It also destroyed crabgrass nuts edge and every other weed listed on its label growing in my yard . Buy it . You will not be disappointed .

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  • 2 of 3 people found this review helpful:

    3 of 5 stars  Certainty Herbicide
    By Al in Texas on 05/09/2017

    Used as directed for nut sedges, first attempt very poor results. After three weeks, will reapply and will post update. The very thick nut sedge I had to use Round Up because it has taken over that area and was afraid to wait anymore for Certainty to work. Three stars and pending...

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Using Certainty
    By Marilyn in Kiln, MS on 10/02/2016

    Works well in Sprayer. Expensive but if it rids yard of certain weeds, I am all for it. In the South, we really have a problem with Nutsedge.

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  • 2 of 2 people found this review helpful:

    4 of 5 stars  Good but a bit slow
    By Charles in Athens AL 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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  • 0 of 2 people found this review helpful:

    1 of 5 stars  Didn't work on my lawn
    By Jason in Little Rock on 04/18/2017

    Didn't touch weeds in my Bermuda lawn. Been 2 1/2 weeks with ZERO effect on any variety. Read directions carefully. Mixed in back pack sprayer, with surfactant, and blue marking dye to see overlaps. Disappointing.

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  • 0 of 1 people found this review helpful:

    1 of 5 stars  Certainty herbicide
    By Donald in Albertville mn on 05/09/2017

    Product did not kill anything that it was suppose to... didn't even kill dandelion. Waste of money

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  • 4 of 5 stars  So far Certainty Herbicide is working!
    By Joe in Hanford, CA on 10/20/2017

    I applied Certainty Herbicide to eliminate nutsedge from my lawn. It has been over two weeks since I sprayed. The weed has stopped growing. The leaves show some yellowing. Now I am waiting for the KILL!

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See all 14 customer reviews »

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Most Helpful Q&A's

05/02/2013 Dean from Iowa

QControlling quackgrass in Kentucky Bluegrass
The Michigan State University extension website says "If your lawn is primarily Kentucky bluegrass, there is a selective herbicide that will remove the quackgrass without killing the rest of your lawn. This product is only available to professional lawn care operators, and they need to make two applications on a 14-day interval. The name of the product is Certainty." However, your Q&A section includes an answer that says Certainty is not "labeled for use on Kentucky Bluegrass." Can you clarify the apparent disconnect?

ASince we do not make this product we have to go by what the manufacturer supplies us with. Kentucky Bluegrass is not on the label so we have to assume it cannot be used on that type of grass. However, here is Monsanto's telephone number 800-332-3111. We recommend contacting Monsanto and speaking with the customer service agent there to verify if this product is safe for kentucky Bluegrass.

11 of 14 people found this answer helpful.
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05/12/2011 Pete

QHow soon can I re-seed after application of Certainty?
Live in MA. Have a predominantly KBG lawn, with some tall fescue creeping in places that I would like to get rid of. After application, how soon can I re-seed any bare spots or over-seed the whole lawn? Thanks!

AAccording to the product label, you should wait at least 3 weeks before re-seeding or over-seeding with Certainty.

8 of 11 people found this answer helpful.
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03/16/2012 Jesse from Des Moines, Ia

QQuackgrass - Is Q4 effective at killing quackgrass?
Are there any chemicals available through your company that can eradicate quackgrass?

AQuackgrass is a grassy weed, so you need a product labeled for grassy weeds.  Certainty is our most popular product for quackgrass and other grassy weeds.

8 of 10 people found this answer helpful.
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06/25/2010 Michael

QI am applying Certainty Herbicides and the instructions indicate I need Non-ionic surfactant. What would be an example of that?
I will be applying this to my bluegrass lawn.

AWe offer DyneAmic Surfactant on our website. DyneAmic is a high quality non-ionic surfactant that greatly enhances the effectiveness of Certainty and other herbicides and fungicides on lawns, ornamentals, trees and landscape areas. The surfactant helps penetrate the natural waxy tissue of plants.

7 of 9 people found this answer helpful.
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04/19/2012 Brian from Marysville, Oh

QHow do I kill tall fescue in a KBG lawn?
I thought I was going to be able to use Certainty to kill the tall fescue in my KBG lawn until I read the note on the label change after 2011. What is the right product to use now?

AWe do not carry a product that will take fescue out of kentucky blue grass.  Unfortunately they are so closely related that you cannot selectively remove it with any product that we are aware of.  Your best option in this scenario is to kill the fescue with a Ranger Pro (glyphosate) product and then re-seed with your KBG.

6 of 8 people found this answer helpful.
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Most Recent Customer Questions

09/11/2017 Bill from Houston, Texas

QWhat can I use to kill the existing Jonson grass in my Bermuda yard?

A

Certainty Herbicide can be used to control Johnsongrass in a Bermuda lawn.†

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09/10/2017 Bennett from Houma, La

QWhat is the best product to kill annual bluegrass in a zoysia lawn?

A

Certainty Herbicide is a great option for annual bluegrass (or poa annua), in a zoysia lawn. The mixing rate is†3-5 small scoops or 1-2 large scoops per gallon of water per 1,000 sq. ft.† It is strongly recommended to also use a surfactant with this product to increase the effectiveness.†

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09/03/2017 Jason from Silverhil, Al

QHow long do I need to wait before I spray Certainty Herbicide on grass?
I seeded Bermuda grass 3 weeks ago. It has been mowed once.

A

According to the product label, you should wait at least 3 weeks before re-seeding or over-seeding with Certainty.

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08/30/2017 Brian from Ridgefield, Wa

QWhat is available to kill tall fescue?

A

Certainty Herbicide can be used to kill tall fescue.† Please check the product label if there are other grasses in the area to ensure that it will be safe to apply.

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08/29/2017 Sunil from Charlotte,nc

QCan either Certainty Herbicide or Dismiss be used to kill Virginia Buttonweed and Dalligrass in a Bermuda lawn?

A

Certainty Herbicide†and Dismiss Herbicide can safely be applied to established Bermuda lawns if used as directed. Certainty is†labeled for controlling/suppressing dallisgrass and Virginia Buttonweed but Dismiss is not.

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07/28/2017 William from Smyrna,tn

QAfter Certainty is applied and has dried is it safe for dogs and children?

A

Yes, once Certainty has dried completely, it is safe for pets and people.†

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07/06/2017 L. from Louisburg, Nc

QWill Certainty Herbicide kill dallisgrass in my Bermuda lawn?

A

Certainty Herbicide is labeled to suppress dallisgrass in bermuda but may not kill it completely.† Several applications would likely be necessary.†

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07/02/2017 Robert from Plano, Tx

QCan I use Certainty to effectively treat yellow nutsedge in my flower bed?
While at the same time ensuring it does not kill my ornamentals in the flower bed.

A

Certainty is only labeled to be used in woody ornamental plantings and perennial groundcovers. †It may harm flowers if they are sprayed or drift contacts them. †Care should be taken to avoid this and only use as a spot spray directly to the nutsedge in this area.

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06/26/2017 Mattg from Calera

QCan you spray Certainty over daylillies?

A

Certainty Herbicide†is not labeled to be applied over daylilies so we would not recommend it. †Care should be taken during application to avoid drift or spray contacting them to avoid injury.

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06/20/2017 Ken

QIs Certainty safe to apply on fine fescue?

A

Certainty Herbicide†should not be applied to fine fescue. Please provide the list of targeted weeds for a recommendation that will fit your needs.

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See all 69 questions »


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