Tenacity Herbicide

$63.50

Free Shipping!  Free Shipping!

4.5 out of 5 stars Rating: 4.6

118 Reviews | 181 Q&A

 Compare

{ $63.50 { $63.35
  Size/Description Price/Ea. Qty
Tenacity Herbicide bottle (8 oz)

Buy 1 or more: $63.50 each

Buy 3 or more: $63.35 each

$63.50
Total Price: $0.00


Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.

Tenacity Herbicide

Tenacity is a systemic pre-emergence and post-emergence herbicide for the selective contact and residual control of weeds in turfgrasses. When applied as a pre-emergent, weeds absorb Tenacity during emergence from the soil. Dry conditions following application may reduce the pre-emergence activity. If rainfall (0.15 inches) has not occurred within 10 days after a pre-emergence application, activate with 0.15 inches of irrigation. When used as a post-emergent, susceptible weeds absorb Tenacity through foliar contact and soil absorption. Foliage of treated weeds cease growth after application, then turn white (loss of chlorophyll) and death may take up to three weeks. A repeat application is required after two to three weeks for improved post-emergence weed control. A non-ionic surfactant should be added in post-emergence applications.




What makes Tenacity different than other currently used turf herbicides?

Tenacity is a selective, systemic herbicide that features a new mode of action for pre- and post-emergence grass and broadleaf weed control in several cool- and warm-season turf species—like keeping bentgrass out of your rough. Tenacity can also be applied on established or newly seeded turf.

How was Tenacity herbicide discovered?

A Syngenta scientist in California noticed that there were fewer weeds growing under his bottlebrush (Callistemon citrinus) plant, far fewer than can be explained by shading alone. He concluded that the plant must be producing allelochemicals to suppress weed competition. Syngenta synthesized mesotrione based on the allelochemicals produced by the bottlebrush plant.

What is the mode of action of Tenacity herbicide?

Tenacity inhibits a plant enzyme called HPPD that is essential to photosynthesis and prevents formation of carotenoids in susceptible plant species. Without carotenoids, light energy and by-products of photosynthesis will destroy chlorophyll and cell membranes. This results in bleaching of leaves followed by necrosis and death of the plant.

How quickly does Tenacity work?

Once absorbed, Tenacity quickly translocates throughout the plant. Weed growth is suppressed soon after application, as photosynthesis is disrupted. Death of the plant usually occurs within two to three weeks.

What are some of the unique benefits of Tenacity herbicide?

Tenacity has pre- and post-emergence activity on 46 dicot and monocot weed species. It can selectively control perennial monocots such as bentgrass and nimblewill and annuals such as crabgrass and goosegrass in many turfgrass species. Tenacity can be applied at the seeding to prevent weed germination and allow the turfgrass species to establish without weed competition.

Can Tenacity be used to get bentgrass out of roughs and fairways?

Yes. Tenacity selectively controls bentgrass out of Kentucky bluegrass, perennial ryegrass, and tall fescue turf.

What does it mean that Tenacity was granted reduced-risk status by the EPA? Why did Tenacity earn this status?

Reduced-risk is an EPA designated registration status that accelerates the process for registration of certain new plant protection products. Tenacity received reduced-risk status by the EPA based on its unique mode of action, low use rates, and favorable toxicity and human health profiles, as compared to other herbicides currently on the market.

On which grasses has Tenacity been tested for use at or prior to seeding?

Tenacity is safe for use at or prior to seeding on Kentucky bluegrass, tall fescue, perennial ryegrass, and centipedegrass. Application at seeding can be made to fine fescue only if it is less than 20% of a seed mixture.

Are there any grasses on which you can't use Tenacity?

Tenacity is not recommended for use on zoysiagrass, hybrid or common bermudagrass, seashore paspalum, or kikuyugrass.

Can Tenacity be tank mixed with other herbicides?

Tenacity can be tank mixed with Barricade, dicamba, carfentrazone, triclorpyr, atrazine, simazine, s-metolachlor, bentazon, and several three-way phenoxy herbicides. Combinations can help turf managers broaden the weed control spectrum or improve the level of weed control over single-product applications.

How rainfast is Tenacity?

Tenacity is rainfast within several hours under normal rainfall conditions.

What other brands currently on the market offer a product similar to Tenacity?

There are currently no other herbicides like Tenacity for golf courses and sod farms registered for use or sale in the U.S. Tenacity will compete with multiple products from different classes of chemistry.

Rating Snapshot

5 stars   89
4 stars   17
3 stars   10
2 stars   1
1 star   1

See all 118 reviews »

Average Customer Rating
4.5 out of 5 stars (118)

Write a Review

Sort By: 

  

Most Helpful Customer Reviews
  • 114 of 121 people found this review helpful:

    5 of 5 stars  Tenacity Herbicide
    By Frank in Johnston, IA on 05/07/2012
    Verified Purchase

    I had a lot of weed grasses in my yard and they were invasive and spreading over the whole yard. Tenacity targets weed grasses and kills them while leaving the rest of the yard in tact and that is exactly what it did. All of my weeds are dying. One thing you must note is that this herbicide needs to be watered after it dries on the plant so that the plant takes it in. It will not work if you just spray it on and don't get rain or water it for a couple of weeks. It's pricy but I know of no other chemical that will kill weed grasses and leave what you want, alone.

    Was this review helpful to you?  Yes No

  • 74 of 77 people found this review helpful:

    5 of 5 stars  A Miracle Herbicide!
    By Margaret in Scarsdale, NY on 08/14/2012
    Verified Purchase

    I had a lawn that was completely taken over by bentgrass. I used round up on the lawn and put in an entire new lawn. All was well for a year or two. Then the the bentgrass came back in a few isolated areas. I would have to round them up at the end of the season and reseed. This went on for a number of years. When I learned about Tenacity I was thrilled and gave it a try. It works wonderfully! Yes it is pricy, however it beats having to round up the bentgrass, clear it out, put down more top soil and reseed. Try it...you won't be disappointed.

    Was this review helpful to you?  Yes No

  • 52 of 59 people found this review helpful:

    5 of 5 stars  Great product! Does exactly what it advertises!
    By Debi in Toledo, Ohio on 09/07/2012

    My mom completely re-sodded front and back lawns and within 3 years it had been invaded by bentgrass. My new lawn was hydro-seeded 5 years ago in a new subdivision that used to be a golf course. Our methodology was to use Roundup in the fall (when the bent grass really seems to take off in growth) and then reseed the large killed off areas, hoping that the Roundup did a thorough job in killing the bentgrass. This becomes very tedious every year, not to mention the expense. We waited a few years for Tenacity to be available to the public and have both been having great results with the product. The good thing is that the remaining blades of good turf remain green in the kill zone. That gives me hope that I may not have to reseed, just wait for the good turf grass to fill in by itself. Our lawns are a combination kentucky blue and fescue blends. My only complaint is that the product is so concentrated and thick. The high concentration makes it even more critical to measure accurately! Not too crazy about the enclosed syringe measuring device. I feel it is too difficult to use and the potential to spill is high. I would love if there could be a more diluted Tenacity product to purchase for the average homeowner. That would make the product easier to measure, plus ensure a bit of wiggle room on the measurements?

    Was this review helpful to you?  Yes No

  • 45 of 49 people found this review helpful:

    5 of 5 stars  No more Crabgrass!!
    By Rob in Greeley, Colorado on 08/23/2012
    Verified Purchase

    This product really works. It does take time, so be patient. I still have to apply the second application to finish off the Crabgrass!!! It won't take much, the plants are almost dead now after 2 weeks.

    Was this review helpful to you?  Yes No

  • 43 of 45 people found this review helpful:

    4 of 5 stars  Appears to be working!!!!!!!!!!!!
    By Del in Decatur, IL on 06/17/2012
    Verified Purchase

    I was skeptical about whether Tenacity could kill the Nimblewill in my lawn and still leave my Blue Grass and Fescue alone. It's been 2 weeks since the first application and it appears to have definitely wounded the Nimblewill. The second application was applied yesterday, so we'll see if it kills it or not. It's a "pricey" chemical, but is easy to use and hopefully effective. If it works it sure beats Roundup and reseeding.

    Was this review helpful to you?  Yes No

Most Recent Customer Reviews
  • 5 of 5 stars  Great product
    By Charles in Nashville, GA on 11/07/2017

    Nutgrass and crabgrass was taking over my yard. As I searched for the right product, I came across Tenacity. It worked excellent. I have centipede and Bermuda grass and it worked fine on both. Even though it specifies not to use on Bermuda, I am planning on redoing my backyard as it is not smooth and I was not very concerned with killing the Bermuda grass. Maybe I was lucky.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  dollar weed
    By Keith in Conway SC on 11/03/2017

    So far product seems to be performing as described. Dollar weed is turning a yellow color. Follow up application being performed this week.

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Tenacity Herbicide
    By Tom in Canton, Ohio on 10/25/2017

    Used Tenacity on my Creeping Bentgrass problem. Put down two applications and the Bentgrass appears to have died, turning brown while leaving the good grass alone. Since its nearing the end of the season I will wait until next spring to see if the Bentgrass returns and the good grass fills in the dead, brown areas, reseeding if necessary. If it does return then will definitely apply again to finish the job. This product worked like a charm and I would definitely buy it again.

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Tenacity
    By Robert in Dayton Ohio on 09/22/2017

    This product exceeded my expectations as both a pre and post emergent it works really well

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  Works great !!!!
    By Joe in Burlington, North Carolina on 09/04/2017

    The best stuff for the money !! Works exactly like is says. Ordering was easy and shipping on time

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    2 of 5 stars  Poor long term results for me
    By Rick in Chico,CA on 08/27/2017

    I've had to change my review from last year due to the fact that all of the Bent grass I thought I killed has recovered. I did 3 sprays last summer/fall. It severely damaged the Bent grass but also bleached the desirable grasses. I'm not sure how others claim that good grasses were not harmed. I had to paint my customers lawns because it was so unsightly. Then I had to reseed. A lot of work only to find that the Bent has come back nearly 100%. It did work better on some other weeds.

    Was this review helpful to you?  Yes No

  • 5 of 5 stars  Kills crabgrass as promised
    By Billy in Augusta, Georgia 30904 on 08/27/2017

    Applied tenacity as directed with the addition of Astrazine and Surfactant on centipede grass. In about a week you could tell something was happening, and in few more days the crabgrass turned white, the death sentence has been delivered. I plan on applying a 2nd application in 2 to 3 weeks after the initial application. Tenacity is the only herbicide you can safely apply on centipede grass and kill crabgrass.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  Nimbleweed killer
    By Neal in Versailles, Ky on 08/26/2017

    I bought this to kill nimbleweed and it appears to have done it's job. It's not cheap, but a little goes a long way, 1/2 teaspoon to a gallon of water. I also bought the surfactant and Mark It Blue to mix with it. Currently a satisfied customer. Shipping was quick.

    Was this review helpful to you?  Yes No

  • 1 of 1 people found this review helpful:

    5 of 5 stars  2nd REVIEW OF TENACITY
    By Ab in Bloomington, IN on 08/25/2017

    I think the fact that I came back and bought more speaks volumes of what I think of Tenacity. Works on nimblewill, but also works great on just about all weeds. USE AS DIRECTED. A little goes a LONG WAY! Thanks for being helpful Tenacity! 10*. Note: Do use in tandem with Non-Ionic Surfactant for Herbicides.

    Was this review helpful to you?  Yes No

  • 3 of 5 stars  tenacity
    By Fred in hamilton mt on 08/22/2017

    had mixed results last fall. waiting for rain to go at it again. fighting creeping bent grass.

    Was this review helpful to you?  Yes No

See all 118 reviews »

Have a question about this product?
Ask our product experts...

Ask a Question

Sort By: 

  

Most Helpful Q&A's

10/11/2011 Mary from Marshfield, Wi

QDo I need to keep the dogs away from the area where I have applied Tenacity?

AYou should keep the dogs off of the area while you are applying Tenacity and until the area has had a chance to dry, about 2-4 hours.

89 of 95 people found this answer helpful.
Was this answer helpful to you?  Yes No

04/21/2015 Wayne

QHow soon can I mow my lawn after an application of Tenacity?

A

You can mow your lawn 2 days before application of†Tenacity Herbicide and 2-3 days after application.†

69 of 75 people found this answer helpful.
Was this answer helpful to you?  Yes No

05/04/2015 Jim from Fort Morgan, Co

QIn one answer about watering you state it does not need to be watered in because it is mixed with water;
however, in another answer you state it does, indeed need to be watered in asap. could you please clarify which is correct. Thank you.

ATenacity is a systemic preemergence and postemergence herbicide for the selective contact and residual control of weeds in turfgrasses. When applied as a preemergent, weeds absorb Tenacity during emergence from the soil. Dry conditions following application may reduce the preemergence activity. If rainfall (0.15 inches) has not occurred within 10 days after a preemergence application, activate with 0.15 inches of irrigation. When used as a postemergent, susceptible weeds absorb Tenacity through foliar contact and soil absorption. Therefore, you should water in Tenacity when using it as a preemergent herbicide but it does not need to be watered in when using it as a postemergent herbicide.

67 of 70 people found this answer helpful.
Was this answer helpful to you?  Yes No

07/20/2015 Lori from Keokuk, Ia

QAfter spraying Tenacity Herbicide, when the weeds turn white, do you pull them or just reseed?
I was told I had nimblewill in my yard. It was a large portion with green blades and brown plus some other weeds. I purchased tenacity from you and applied it. The areas that were brown and green haven't turned white but the are scattered portions of other weeds that have. Does that mean anything? Also, am I supposed to pull them after they turn white and reseed?

A

After spraying with Tenacity Herbicide, the foliage of treated weeds cease growth after application, then turn white (loss of chlorophyll), and death may take up to three weeks. A repeat application is required after two to three weeks for improved postemergence weed control. We would not recommend pulling up any weeds because the product will not get into the root system, and the weeds may come back at that point.

61 of 63 people found this answer helpful.
Was this answer helpful to you?  Yes No

03/10/2014 Thomas from Cut Off, La.

QWhat is the shelf life of Tenacity?

AThe shelf life on most liquid herbicides all depends on how they are stored. If the product has been tightly sealed and kept out of sunlight and extreme temperatures, the shelf life is 3-5 years.

55 of 57 people found this answer helpful.
Was this answer helpful to you?  Yes No

Most Recent Customer Questions

10/17/2017 Johnnie from Dunn, Nc

QWill Tenasity kill ornamental shrubs?

A

Avoid applications of†Tenacity? over the top of exposed roots of trees and ornamentals. Please refer to the†product label†for full detailed usage instructions.

Was this answer helpful to you?  Yes No

06/06/2017 Bill from Minneapolis, Mn

QDoes Tenacity Herbicide have any effect on quackgrass?
I know the product is not listed for quack grass, but when I sprayed a patch, while spraying for bent grass, the tips of the leaves turned white. Would additional spraying have any beneficial effect?

A

Since quackgrass is not on the label to be controlled by the Tenacity, we cannot recommend you use it for this application. We do, however, carry†Certainty, which is a selective post-emergent herbicide like Tenacity, that does have Quackgrass listed on the label under†weeds controlled. You can see the dilutions and what grasses are tolerant of Certainty†on the†product label.

Was this answer helpful to you?  Yes No

05/24/2017 Srchief from Lehighton, Pa

QCan you apply Tenacity in the middle of the summer?

A

Yes, Tenacity can be applied in the summer. †Keep in mind that the best temperature range to apply most herbicides, including†Tenacity, is between 65-85 degrees.

Was this answer helpful to you?  Yes No

05/11/2017 Joyce from Gray, Me

QHas anyone used this to kill Horse's Tail (Equisetum arvense)?
Please note : this is not the same weed as Mare's Tail (Conyza canadensis) Thanks!

A

No, Tenacity Herbicide is not labeled for Horse's Tail (Equisetum arvense), so we would not recommend using this product for it.

Was this answer helpful to you?  Yes No

05/07/2017 Cc from Michigan

QWill Tenacity kill Orchard Grass, Quackgrass, and Tall Fescue?

A

No, Tenacity Herbicide will not kill or eliminate orchard grass, quackgrass or tall fescue.

Was this answer helpful to you?  Yes No

05/07/2017 Mike from Harleysville, Pa

QHow many ounces of Tenacity Herbicide should I put in a 26 gallon boom sprayer?
How many ounces of tenacity and surfactant are needed in a 26 gallon boom sprayer for general lawn/grass weed maintenance? Ive read for tenacity, 1 teaspoon per 2 gallons of water but also 4-8 oz per acre in at least 30 gallons of water. How much surfactant should be included?

A

When using Tenacity Herbicide, the amount of water is not what is important; the right amount of product is. The rate for 1000 square feet is 1 teaspoon. The will mix in 1-2 gallons of water. Please let me know how much area you are treating to give you the best rate.

The rate of the surfactant is 1-2 teaspoons per gallon of water. For 26 gallons of water, the rate of surfactant is 26-52 fl oz.

Was this answer helpful to you?  Yes No

05/06/2017 Chris from Nashville, Tn

QCan Tenacity Herbicide be applied in a Bermuda/Fescue mix lawn? Will it hurt my Bermuda?

A

Tenacity Herbicide†will harm Bermuda lawns. Please contact us at 866-581-7378 M-F 9-5PM EST for an alternative product selection that will best fit your needs. Thank you!

Was this answer helpful to you?  Yes No

05/02/2017 Rob

QHow much surfactant should I add to my 2 gallon tank sprayer when using Tenacity?

A

You did not mention which surfactant you are planning to use with the Tenacity.† The one that is most commonly recommended is the Southern Ag Non-Ionic Surfactant for Herbicides, which requires 1-2 teaspoons per gallon of water.†

Was this answer helpful to you?  Yes No

05/01/2017 Terry from Islip Terrace, Ny

QWill Tenacity kill lawn fungus?

A

Tenacity Herbicide†will not†kill lawn fungus. It is a†herbicide that will only eradicate listed weeds in listed turfgrass only. We do offer fungicides for the lawn.†

Was this answer helpful to you?  Yes No

05/01/2017 Jeff from Menomonie, Wi

QWhen is it too late to apply Tenacity as a pre-emergent for crabgrass control?

A

Tenacity Herbicide†can be applied any time before the weeds start to germinate. Weeds absorb Tenacity as they emerge from the soil. For the best time to apply pre-emergents in your county we recommend contacting your local cooperative extension office here. Crabgrass seeds will start to germinate when soil temperature are around 55 degrees, so you need to apply it before you have those temperatures for best results.

Was this answer helpful to you?  Yes No

See all 181 questions »


Purchase and Buy Tenacity Herbicide for sale now
with the best online lowest price and free shipping!


We only sell professional do it yourself pest control (diy), exterminator and extermination
pesticide, chemical and bug killer treatment products to spray, exterminate and eliminate pests.

These products are not available in stores such as Home Depot, Lowes, Walmart or Ace Hardware.
We accept VISA, MasterCard, American Express, Discover and PayPal Payments.