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Certainty Turf Herbicide is a selective, post-emergent herbicide that controls labeled weeds in residential and commercial turf and ornamentals.
Certainty Turf Herbicide is easy and flexible to use. Certainty weed killer offers excellent control of both purple and yellow nutsedge, Kyllina, globe and annual sedge, and broadleaf weeds. Combined with a non-ionic surfactant, Certainty Herbicide attacks nutsedge through broadcast applications or spot treatments. Certainty also controls cool-season grasses, such as Poa annua (annual bluegrass), Poa trivialis, tall fescue and perennial ryegrass, in warm-season turfs.
With Certainty Turf Herbicide, you get the most complete package of turf safety, application flexibility and broad-spectrum weed control versus the competition.
Dallisgrass: Please note that Certainty is labeled for suppression of dallisgrass only and can only be used for dallisgrass when tank mixed with another herbicide such as MSMA or Revolver (which are not for residential use).
Only for use on the following warm season grass types: Bermudagrass (common or hybrid), Bahiagrass, Buffalograss, Centipedegrass, Kikuyugrass, St. Augustinegrass, Seashore paspalum, and Zoysiagrass.
Product Documents
| Active Ingredient | Sulfosulfuron - 75% |
|---|---|
| Target pests |
Kyllinga (green, false green, fragrant), Purple Nutsedge, Yellow Nutsedge, Globe Sedge, Annual Sedge, Tall Fescue, Barley (little), Bedstraw, Bentgrass, Bluegrass, Burweed, Buttercup, Chickweed, Clover, Crowfootgrass, Dandelion, Garlic (wild), Geranium, Henbit, Ivy (ground), Johnsongrass, Mustard (wild), Pennycress (wild), Quackgrass, Ryegrass, Shepherds purse Suppresses Buttonweed and Annual Bluegrass (Poa Annua). Suppresses Dallisgrass in Bermudagrass (as a tank mix only). |
| For use in | Warm Season Turf, Ornamental and native grass sites |
| Application |
3 - 5 small scoops or 1 - 2 large scoops per gallon of water per 1,000 sq. ft. * Use a Surfactant to Increase Effectiveness * See label for complete application instructions |
| Yield |
One 1.25 ounce bottle is equal to 35.44 grams The bottle comes with a small scoop (.16 grams) and a large scoop (.8 grams) |
| Formulation | Professional Product |
| NOT FOR SALE TO | DC, PR |
| Coverage Area | Treats from 10,000 to over 35,000 sq. ft. (depending on the weed and grass) |
| Shipping Weight | 0.18 lbs |
| Manufacturer | Nufarm |
| UPC | 070183383344 |
| EPA Registration | 59639-226 |
Certainty Herbicide is a professional-grade solution designed to control tough weeds in both residential and commercial turf. It is specially formulated for warm-season grasses, providing reliable control of:
This herbicide is known for its excellent nutsedge control and flexible application options. It can be used as:
For best results, apply Certainty with a non-ionic surfactant to improve coverage and absorption.
Overall, Certainty Herbicide offers a well-rounded combination of effectiveness, turf safety, and application versatility for managing weeds in warm-season lawns.
*Note: Certainty Turf Herbicide is not labeled for golf course putting greens or within 4 feet of the putting green.
Dallisgrass: Please note that Certainty is labeled for suppression of dallisgrass only and can only be used for dallisgrass when tank mixed with another herbicide such as MSMA or Revolver (which are not for residential use).
Certainty Herbicide works best when applied to established warm-season grasses (such as bermudagrass, zoysiagrass, and others) while target weeds are actively growing.
For optimal results and lawn safety:
Avoid applying during the transition period (when grass is coming out of dormancy), as turf is more sensitive at this stage. Applications during transition can cause temporary discoloration or slowed growth, though the grass typically recovers.
It’s best to avoid applying right before or during spring green-up. This transition period is when turfgrass is most sensitive.
If an application is necessary during this time:
Whenever possible, wait until your lawn is either fully dormant or fully green to minimize stress and achieve the best outcome.
Certainty Herbicide begins working quickly, but visible results take time:
Performance depends heavily on the environment:
Even if you don’t see immediate changes, the product is actively working below the surface.
Certainty Herbicide uses a scoop-based measurement system, and the correct rate depends on:
Included scoop sizes:
Because application rates vary, always refer to the product label’s mix chart for precise instructions based on your specific weed and turf type. This ensures both effective control and turf safety.
For best weed control results:
This allows the herbicide to fully absorb through the foliage and roots, maximizing effectiveness.
Kills poa annua in centipede
By Rich 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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76 of 79 people found this review helpful
It killed Johnsongrass!
By Anonymous on 07/01/2013
Verified Purchase
Quackgrass Dead On Arrival!
By Ken 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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51 of 55 people found this review helpful
Awesome
By Jeff 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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48 of 50 people found this review helpful
Worked! Killed Quack and Crab Grass Not Kentucky Bluegrass
By Tracy on 06/18/2020
I was worried about using something this expensive and not knowing what I was doing. We also have Kentucky blue grass and I did not see that it was one of the approved grasses that it would not hurt. I used 5 small scoops for every two gallons and also used Surfactant and blue dye to make sure it was evenly sprayed. The First week or two I thought I had wasted my money. Nothing looked like it was going to die, and it stunted the growth of my whole lawn to the point that we only had to mow it after two weeks instead of one. I was worried it was going to kill my whole lawn. After about a month it noticed that the quack and crab grass was turning brown. It has now been a couple months and my normal grass is doing fine and I have a bunch of dead areas where all the quake/crab were really thick and I am putting down some extra seed to get something growing there. Hope this helps.
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29 of 29 people found this review helpful
I have a normal turf lawn, and am interested in getting rid of the broad leaf weeds. I need to cover for a lawn of 3 acres.
I will be applying this to my bluegrass lawn.
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40 of 47 people found this answer helpful
I live in East Texas. These things look like miniature Mimosa trees, and they are very prolific. They are apparently quite hardy, Sedge Hammer won't kill them.
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5 of 10 people found this answer helpful
We had brown patch last fall and did not treat it. There are several huge patches in once acre of St. Augustine grass. We were told by the extension office to use Daconil and Immunox. I'm not seeing a suggestion or sale of these two products on your web site. What do you recommend for brown patch? We want to treat it now in the Houston, Texas area, so we do not have this in the spring-summer. Thanks
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1 of 1 people found this answer helpful
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!
Will it kill grassy weeds withot harming KBG?
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7 of 9 people found this answer helpful
Are there any chemicals available through your company that can eradicate quackgrass?
Our most popular general weed control product that is selective, meaning it will not harm your turf grass but it will kill your weeds, is End Run.
End Run is labeled for just about any weed you could have including clover, dandelions, and chickweed and will not harm your grass. Best of all, it comes with a surfactant already mixed in the product so you do not have to purchase and mix a surfactant separately like you do with most of the other herbicides that we sell.
Here is a link to the End Run: http://www.domyownpestcontrol.com/endrun-herbicide-with-trimec-p-1501.html
Please let me know if you have any further questions.
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4 of 4 people found this answer helpful
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?
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13 of 16 people found this answer helpful
I want to kill my Tall Fescue. I've read it is a "cool season grass." What is the best time of year to apply Certainty? In addition, is a surfactant necessary or does it simply aid the absorption? I have about 1/2 acre to treat Thanks
You should mix Certainty with a surfactant to increase its effectiveness.
It would be best to call your local county extension office for when to apply any type of herbicides or insecticides in your area. They would know better than we would since we are not the manufacturer and we live in Georgia. They will know exactly when you should apply it in your specific county.
You can find your local county extension office information here: http://npic.orst.edu/pest/countyext.htm
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1 of 3 people found this answer helpful
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?
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24 of 34 people found this answer helpful
Can I control broadleaf weeds on a newly seeded lawn of tall fescue?
Certainty Herbicide - 1.25 oz.
Rating: 4.3 (42 Reviews / 153 Q&A)
