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.
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.
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.
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.
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.
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.
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.
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.
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, 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 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.
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 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 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 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 is applied at 4 - 8 oz. per 30 gallons of water per acre. This means 1 kit could cover 1-2 acres.
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. We recommend contacting your local cooperative extension office and speak with the master gardener in your area for advice for specific timing in your area.
Tenacity Herbicide is not labeled for perennial peanut also known as "Florida Alfafa". Grass Out Max is labeled for perennial peanut for control of grassy weeds. 2,4-D Amine Herbicide is labeled for this weed around specific crops. Please view the product label here for more information.
We also recommend contacting your local Master Gardener with the Cooperative Extension Office for recommendation proven to be effective in your area.
As you probably know, Centipedegrass is a very sensitive species of turf so many products that eliminate the crabgrass and other weeds can also cause damage to your lawn.
Tenacity is a great pre-and post-emergent herbicide that will control crabgrass along with many other types of weeds and listed safe for centipede lawns. When used for post emergent control of actively growing weeds, a non ionic surfactant is recommended for best results. The surfactant is not needed for pre emergent applications. Turf Mark Blue can be tank mixed to allow you to see where you have treated and to ensure thorough coverage and avoid overlapping.
Review the Tenacity product label and apply as directed to avoid possible injury to your turfgrass. Keep in mind, this is a strong herbicide so any overmixing, overapplying or applying when centipede is transition in or out of dormancy can injure the lawn. Some whitening of the weeds and turfgrass is normal as this is part of the weed killing process, but the color will return in 3-4 weeks at most or after the next 1-2 mowings.
