Tenacity Herbicide is applied at 4 - 8 oz. per 30 gallons of water per acre. This means 1 kit could cover 1-2 acres.
Tenacity Herbicide can be applied to dormant bermudagrass only without injuring the bermudagrass. However, a better product would be Negate 37WG.
Negate 37WG can be used on dormant or growing turf for listed weeds as directed on the product label.
Tenacity Herbicide can be applied as a pre-emergent before or at the same as seeding. We recommend that you only apply Tenacity after seeding if you can make the application within 7 days of seeding. Otherwise, you would need to wait until the new grass has come up and been mowed at least twice.
Tenacity Herbicide cannot be used on residential St Augustine lawns and will not eliminate woodsorrel.
To control woodsorrel (also known as oxalis) in a St Augustine lawn, you could use a product like Hi Yield Atrazine, or Fertilome Weed Free Zone.
It is recommended to apply a pre emergent like Pendulum 2G in Fall and Spring. (55 degrees in the Spring / Between 70 and 55 degrees in the Fall). Pre emergents prevent weeds from germinating which will help cut down on the amount of post emergents needed during growing seasons.
View our St. Augustine Lawn Care Guide and Warm Season Calendar Schedule for more information.
Tenacity is not usually applied in December since it is most often applied to cool season turfgrasses, and it would be too cold in December to use herbicides in most areas with these turfgrasses. Whether Tenacity will work for your needs will depend on the type of desirable turfgrass you have and what specific weeds you are targeting. Tenacity is not safe to use on St. Augustine, zoysia, or Bermuda grass lawns.
Tenacity is usually applied as a pre-emergent in the fall or spring before overseeding with cool season grass such as rye or fescue. As a post-emergent, you would only spot treat with Tenacity as directed on the product label since this product can cause temporary whitening on desirable turfgrass.
Tenacity Herbicide can be used both in spring and fall for pre emergent control of weeds when soil temps are around 55 degrees. Tenacity is one of the top pre emergents for cool season turfgrasses in fall and can be applied at the same time as overseeding without inferferring with grass seed germiantion.
For post emergent control of actively growing weeds, a Non Ionic Surfactant is required to be added to tank mix. Post emergent applicaitons can be applied anytime the weeds are actively growing. Please refer to the list of Weeds Controlled on the product label for information on pre/post emergent control of targeted weeds.
If Tenacity Herbicide or any herbicide is exposed to extreme freezing or heat temperatures, the concentrate can and would lose efficacy. When stored in cool dry and temperature controlled environments, the shelf life is 3-5 years.
The whitening process that occurs after applying Tenacity can take anywhere from a few days up to about 3 weeks. Timing of complete death of weeds can vary depending on the type of weeds, the height and root system, soil temps, weather and temperatures in the region. The foliage of treated weeds cease growth after the application and then the loss of chlorophyll that causes the whitening will begin with death occuring typically after 3 weeks. The product label does advises that a repeat application is required after two to three weeks for improved postemergence weed control.
Review the Weeds Controlled starting on page 8 of the product label to verify the weeds you are targeting as listed for Post Emergent Control with Tenacity and that a Non Ionic Surfactant is tank mixed for the application.
Tenacity when applied for pre emergent applications in early spring and late fall to help prevent weeds from germinating and would not require the use of a Non Ionic Surfactant and the whitening process does not occur with pre emergent applications.
Tenacity is not labeled to treat sweet grass.
You can use a non selective such as Drexel Imitator Aquatic Herbicide to treat for sweetgrass and then reseed any barespots.
Please view this article HERE for other information on how to treat this weed.
Yes, you can use another pre-emergent with Tenacity Herbicide if you need to for additional or longer weed prevention. Keep in mind that other pre-emergent herbicides cannot be applied before seeding, though. We have more tips in our Crabgrass Prevention Guide here.
Tenacity is labeled for post emergent control only of creeping charlie (ground ivy), it does not control ground ivy for pre emergent applications. When using Tenacity for post emergent applications, a non ionic surfactant should be used in a tank mix for best results.
Please review the product label for your turfgrass type and application rates.
Post emergent applications are most effective if applied when weeds are young and actively growing. View our Creeping Charlie (Ground Ivy) Treatment Guide for more information.
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Yes, it will sometimes take 3 applications of Tenacity Herbicide to fully start eradicating the nimblewill. Make sure you are using 1 tsp of Tenacity with 2 tsp of surfactant to 1 gallon of water as this is needed for best results.
Please view the product label for more information.
You will need to wait until the new grass has germinated and is well-established before applying Tenacity or other post-emergent herbicides. Turfgrass is generally considered established after the second mowing.
Sensitive means that certain turfgrasses or conditions can result in injury when applying even selective herbcides such as Tenacity Herbicide. It will not kill the weed, grass or plant completely but you may see some browning, wilting or discoloration for a short period of time before it recovers.
There should be no issues applying Tenacity around the same time as a feritlizer or reseeding. When reseeding the Tenacity product label suggests apply seed at the time of application or as close to it as you can.
Check the product label for the fertilizer you are using to make sure it doesn't state that it cannot be used with herbicides.
Since water is acting as the carrier to get the Tenacity Herbicide into the soil, you cannot use "too much" water when applying. Typiclally, one gallon of water should be used to thoroughly cover a 1,000 sq ft area so if treating a 1/4 acre you will use 11 gallons of water total. If making 2 passes to distribute the 1.5 ounces, you can use at least 5-6 gallons of water each pass.
We have not heard of the dye indicator not being visible when mixed per the product label instructions. Please contact us directly at 866-581-7378 to further discuss depending on the dye indicator used and the dye indicator ratio to water volume used.
Regarding tank mixtures of various herbicides, including Tenacity Herbicide and SedgeHammer Herbicide, all product labels should be referred to for mixing restrictions, while always adhering to the most restrictive label. If tank mixtures are not prohibited, it is then advisable to make a small jar test for compatibility purposes, before mixing a full tank.
Tenacity Herbicide can certainly damage your turf if overapplied. Although we cannot predict the outcome of your lawn application, we are hopeful that the damage sustained will be minimal.
For further details on the affects of overtreating on your lawn, please contact Syngenta at 866-796-4368.
When applying Tenacity Herbicide, water acts as the carrier to distribute the active ingredient evenly and thoroughly over the lawn. get the herbicide into the soil. Be sure you are using enough water volume to cover each 1000 sq ft area. This can be applied the day or close to seeding as possible. If rainfall has not occured within 10 days of the intitial application, it is recommended to water the lawn with 0.15 inches of irrigation.
Please view the full product label for more information.
