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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
Certainty Herbicide - 1.25 oz. is applied per acre with sufficient volume of water (10-50 gallons for ground equipment) to cover the acre (other mix rates listed on the label for smaller areas). The tank mixing instructions with other products can be found here.
Certainty Herbicide is not labeled for applications to carpetgrass so could injure it but is safe for bermuda. We are unable to find a selective that can be used for poa annua safely in this turf. You can use Dimension 2EW for pre emergent prevention of poa annua and spot treat actively growing poa with a non selective herbicide and reseed/sod the bermuda.
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1 of 1 people found this answer helpful
You could use a product like Dismiss Turf Herbicide to kill sedge and other weeds in the area. The most effective sedge products kill the plant slowly, and can often take a repeat application after 6 weeks to see full control. Nutsedge spreads through nutlets and tubers below the ground, so often when you kill the top plant, some of the attached tubers a few inches over will sprout a new plant. This is what makes sedge so invasive and hard to eliminate.
Certainty Herbicide - 1.25 oz. is safe to apply on Zoysia but not if it is in a transitional state. You will want to wait till your lawn is fully green before applying any products on it or apply only as a spot treatment directly to weeds.
Is it better to apply now (early December) or wait until closer to spring? I've got 1,100 SF of Kurapia.
Is there an alternative for cool-season grasses that controls Poa triv like this product? Need help desperately. Thank you
Acclaim Extra can be used to remove poa trivialis from the listed cool season grasses on the label.
Looking at Tencity, which I've used for my poa annua problem and worked, but now looking like poa triviales is in. I see you offer Certainly but not clear if this is a good choice for my lawn?
Certainty Herbicide - 1.25 oz. is not labeled for Kentucky Blue Grass. For Poa Triviales in cool-season lawns, you will need to use Acclaim Extra Selective Herbicide
Unfortunately, there has not been any testing done by the manufacturer of Tenacity on the compatibility of tank mixing Tenacity Herbicide and Certainty Herbicide. We would suggest doing a small compatibility test in glass jar to see if the products separate or clump in any way. The Certainty Herbicide product label advises to add water to the tank ½ way then add the Certainty first and then the Tenacity, shake vigorously and fill the remaining way with water and shake again.
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2 of 2 people found this answer helpful
Certainty Herbicide can be used to measure with another larger utensil (dedicated for this use or disposable) if desired.
The application rate is 3 - 5 small scoops or 1 - 2 large scoops per gallon of water per 1,000 sq. ft. Depending on if you need to measure out the equivalent of small or large scoop for your application, the small scoop is equal to 0.16 grams and the large scoop is equal to 0.8 grams.
View the full product label for more information.
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1 of 1 people found this answer helpful
Also, will this work as a pre-emergiant
I have crepe myrtles and maple trees planted in the lawn. They have 3 ft diameter mulched tree rings around the trucks. I have Bermuda grass.
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0 of 1 people found this answer helpful
Certainty Herbicide - 1.25 oz. is not labeled to control goosegrass.
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2 of 2 people found this answer helpful
Thank you.
While Certainty Herbicide - 1.25 oz. cannot be applied to cool season lawns SedgeHammer + Herbicide provides selective post-emergent control of purple nutsedge, and can safely be applied to well established cool season turf grass types such as Kentucky Bluegrass, tall and fine fescue, and perennial ryegrass. Sedgehammer + is considered one of the more "gentle to turfgrass", if used as directed on the manufacturer's product label.
Certainty Herbicide - 1.25 oz.
Rating: 4.3 (42 Reviews / 153 Q&A)
