Tenacity Herbicide - Questions & Answers

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  • Asked by John from Ames, Ia
    06/02/2013
    Q
    How long do I need to wait to start bagging my lawn for composting the clippings.
    I heard the product stays active even after composting and may harm my garden plants.
    A
    We contacted Syngenta which is the manufacturer of the product. According to Syngenta, once you have cut your grass, you would need to put the clipping in the compost pile and let it sit for at least 30 days. After 30 days the chemical has broken down in the clippings and can be used in other areas of the yard where you are growing garden plants.
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    183 of 197 people found this answer helpful.
  • Asked by Nancy from Oriskany,ny
    09/01/2014
    Q
    How soon can I mow the lawn after applying Tenacity?
    A

    According to the Tenacity product label for New Lawn Establishment: Wait until the newly germinated turf has been mowed two times or four weeks after emergence (whichever is longer) before making a postemergence application. If it is an established lawn, we recommend waiting to mow your lawn 2-3 days after application and 2 days prior to application. 

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    171 of 205 people found this answer helpful.
  • Asked by David from Statesville, Nc
    09/14/2016
    Q
    Do you need to add a surfactant for Tenacity Herbicide pre-emergent application?
    A

    No, when using Tenacity Herbicide as a pre-emergent a surfactant is not needed. Only when you are using it as a post-emergent.

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    169 of 180 people found this answer helpful.
  • Asked by Thomas from Glen Allen
    07/01/2016
    Q
    How many times can you apply Tenacity Herbicide to the same lawn in a season?
    Is there a limit? I am seeing results from the first 2 applications (2.5 weeks apart), but it is not fully killing the yellow nutsedge I was looking for it to do. Thanks.
    A

    You can apply Tenacity Herbicide multiple times per year as long as you do not exceed the maximum annual rate of 16 oz per Acre per year. To treat yellow nutsedge, you may need to reapply Tenacity after 2 to 3 weeks; be sure to use a non-ionic surfactant for post-emergent applications. We would allow at least 2 week for nutsedge to yellow after herbicide applications.

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    135 of 148 people found this answer helpful.
  • Asked by Maria from Portland, Or
    02/11/2015
    Q
    The bentgrass is gone. How often do I need to spray Tenacity to keep the bentgrass out?
    I don't want the bentgrass to come back. Please let me know at what interval I should spray Tenacity.
    A

    We apologize but there is not an exact time frame of how often you should apply the Tenacity Herbicide to keep the bentgrass out of your lawn. The product label states that the Tenacity acts as a pre and post emergent on bentgrass so it should help prevent it for at least a few months if you sprayed recently as a spring application. Post emergent wise, you would apply it as you start to see new signs of bentgrass growth to eliminate it as its come up at that point. Tenacity is a strong product so you dont want to over apply the product and risk harming/burning your lawn or whiten it too much. You could easily apply it every 3 or 4 monts and should be fine however per the product label regarding treating for bentgrass it states:

    Control of bentgrass (Agrostis spp.) and nimblewill (Muhlenbergia schreberi) – Apply Tenacity at 5 fl. oz. per acre in at least 30 gallons of water per acre at two to three week interval for up to three applications. Apply with a NIS surfactant. Bentgrass control may be more effective in the late summer/early fall just prior to onset of renewed bentgrass growth, than spring/early summer applications.

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    125 of 146 people found this answer helpful.
  • Asked by Joe from Woodville
    11/04/2019
    Q
    At what temperature can I apply Tenacity Herbicide?
    A

    Tenacity Herbicide may be applied when soil temperatures are around 55 degrees or higher.  Do not apply when air temperature exceeds 85 degrees. Your target temperature range will depend on whether you are using Tenacity for pre-emergent or post-emergent applications. This is typically between 65-85 degrees. Please consult the product label for complete application instructions.  

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    119 of 140 people found this answer helpful.
  • Asked by Bob from Warrenton, Va
    09/16/2016
    Q
    How long after applying Tenacity before I can apply fertilizer?
    A

    We recommend waiting 2-4 weeks between applications of herbicides and fertilizers to avoid over stressing the treated areas.

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    117 of 129 people found this answer helpful.
  • Asked by Mike from Michigan
    09/15/2015
    Q
    Can I apply fertilizer during the treatment period without harming effectiveness of Tenacity?
    A

    There should be no issues applying Tenacity around the same time as a feritlizer as long the label on the fertilizer does not state that it cannot be used with herbicides.

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    113 of 115 people found this answer helpful.
  • Asked by Danny from Bluffton,sc
    08/04/2015
    Q
    Will Tenacity Herbicide kill crabgrass coming up in my Centipedegrass lawn without harming the grass?
    A

    Tenacity Herbicide would be a great option for you to control crabgrass without harming your Centipede lawn.  Tenacity needs to be tank mixed with a non ionic surfactant or the best results and stick to the leaf surface of the weeds, and its advised to use a dye like Turf Mark Blue with it so you can make sure to not overlap if you plan to do a broadcast application on the property. According to the Tenacity product label you will need to mix 1/2 tsp of product + 1 1/2 tsp surfactant with 1 gallon of water for spot treatments. 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. 

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    108 of 114 people found this answer helpful.
  • Asked by Laurie from Southold, Ny
    04/19/2013
    Q
    Does Tenacity kill Zoysia grass?
    I'm looking for a product that will kill Zoysia grass.
    A
    According to the product label: Bentgrass, Poa annua, kikuyugrass, zoysiagrass, seashore paspalum and bermudagrass are sensitive to Tenacity applications. Avoid spraying these turf types unless control and/or injury can be tolerated. Maintain a five foot buffer between treated areas and bentgrass or Poa annua greens. While Tenacity is not labeled to kill zoysia it will most likely do so.
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    105 of 116 people found this answer helpful.
  • Asked by Lea from Melbourne, Victoria, Australia
    01/15/2012
    Q
    Could you please confirm that Tenacity will not kill of Tall Fescue or any other grasses?
    Is Tenacity available in Australia, Melbourne
    A

    Tenacity Herbicide is labeled for use on Tall Fescue, Kentucky Bluegrass, Centipedegrass, Buffalograss, Perennial Ryegrass, Fine Fescue, St. Augustine Grass. Other species of grass such as Bentgrass, Poa annua, kikuyugrass, zoysiagrass, seashore paspalum and bermudagrass are sensitive to Tenacity applications and damage may occur. According to the product label - Residential Lawn Applications: Unless renovating and/or re-seeding the home lawn, avoid broadcast applications of Tenacity for pre and post-emergence weed control because undesirable whitening of some turfgrasses may occur.

    We do not ship to Australia and we are not sure if the manufacturer offers Tenacity in Australia. You can contact the manufacturer, Syngenta, to inquire about availability 866-796-4368.

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    98 of 109 people found this answer helpful.
  • Asked by Srchief from Lehighton, Pa
    05/24/2017
    Q
    Can 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.

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    95 of 100 people found this answer helpful.
  • Asked by Jon from Miller Place
    05/24/2018
    Q
    How long after using Tenacity Herbicide will I see results?
    A

    When using Tenacity, 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. 

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    86 of 95 people found this answer helpful.
  • Asked by John from Leesburg, Va
    04/19/2019
    Q
    How long until the bleaching effect goes away from good grass when using Tenacity Herbicide?
    A

    Tenacity Herbicide does cause whitening of plants since its mode of action is to prohibit chlorophyll production in target plants. According to the product label, this product may cause temporary whitening of turfgrass foliage. In general, symptoms appear five to seven days after application and last for several weeks. Grass usually recovers after 3-4 weeks.

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    82 of 84 people found this answer helpful.
  • Asked by Steve from Conway, South Carolina
    09/02/2015
    Q
    Can I apply "tenacity" and the "non-ionic surfactant" while the morning dew is still on the grass?
    I waited until the morning dew had dried off of my lawn before applying the product "tenacity" and the "non-ionic surfactant"...However, I overlooked a small detail. The temperature had exceeded 80 degrees.....I assume closer to 84 -87 degrees......was my application in vain?
    A

    Morning dew will not lessen the effects of Tenacity. It some circumstances a more moist soil will make for better root uptake. You are safe to make the Tenacity application in the cooler times of the day when temps are below 85 degrees. If temps rise above 85 degrees after the product has dried it should not reduce effectiveness. 

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    80 of 83 people found this answer helpful.
  • Asked by Bob from Rockville
    07/17/2015
    Q
    Is evening application of Tenacity Herbicide okay?
    Will application of Tenacity in the evening be as effective as applying in the early or mid-morning?
    A

    Yes, Tenacity Herbicide can be used in the evening time. The application should be made in the early morning or late evening so that it does not burn plants. See the product label for complete application instructions.

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    79 of 83 people found this answer helpful.
  • Asked by Gregg from Hastings Ne
    07/08/2013
    Q
    What is the application frequency for Tenacity?
    How often should Tenacity be applied? I have made one application and am seeing some results after 5 days. Do I need to reapply and if so, how soon?
    A
    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. Please let us know if you have any other questions.
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    76 of 82 people found this answer helpful.
  • Asked by Brent from Rochester Mn
    04/29/2019
    Q
    Should Tenacity Herbicide be used as a broadcast spray or a spot spray?
    A

    Tenacity Herbicide can be used as a spot treatment in your lawn. A broadcast application would be considered spraying over the entire lawn area. Spot treatment is used when you only have certain spots or areas that need to be treated versus the entire lawn. According to the product label unless renovating and/or re-seeding the home lawn, avoid broadcast applications of Tenacity for pre and post-emergence weed control because undesirable whitening of some turf grasses may occur. Please follow the specific directions on the product label for your needs. 

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    76 of 96 people found this answer helpful.
  • Asked by Dottie from Rotonda West, Florida
    10/22/2018
    Q
    Is Tenacity safe to apply to St. Augustine grass to kill crabgrass?
    A

    Tenacity Herbicide is only labeled for use on St. Augustine grass that is grown on sod farms.  It cannot be used on St. Augustine in residential lawns.  Blindside WDG Herbicide is labeled to treat crabgrass in residential St. Augustine lawns.

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    71 of 150 people found this answer helpful.
  • Asked by Shawn from Winston Salem, Nc
    03/13/2019
    Q
    What is the lowest temperature you apply Tenacity Herbicide ?
    Spring is not here yet, but temperature are high in 50's and low in the 30's. Some days are in the 60's.
    A

    Tenacity Herbicide should be used when the temperatures are consistently above freezing on a daily basis. Your target temperature range will depend on whether you are using Tenacity for pre-emergent or post-emergent applications. This is typically between 65-85 degrees.   Please consult the product label for complete application instructions.  

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    64 of 101 people found this answer helpful.
Displaying 21 to 40 (of 591 questions)