Tenacity Herbicide calls for 5 to 8 oz of per acre, unless treating St. Augustine turf grown from sod, you would use 4 oz per acre. If you plan to use Tenacity at low rates of 5 oz per acre then you would use 0.11 oz per 1000 sq/ft or 0.45 oz per 4k sq/ft. If you want to use the high rate of 8 oz per acre then you would use 0.18 oz per 1000 sq/ft or 0.72 oz per 4k sq/ft. Be sure to use at least 1 gallon of water per 1000 sq/ft that you treat, and mix your non-ionic surfactant into the tank at the rate of 2 teaspoons per gallon of water. Spray foliage of target weeds until wet but not until the point of runoff. If a reapplication of Tenacity is needed, you can reapply after 2-3 weeks from your initial application.
For bentgrass control, Tenacity Herbicide should be applied at 2-3 week intervals for up to 3 applications.
According to the Tenacity product label, you will need to mix 1 tsp of product + 3 tsp surfactant with 2 gallons of water for spot treatments applied at a rate of 1 gallon per 1,000 sq ft. It is 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. Repeat applications can be done after two to three weeks for continued post emergent weed control.
Tenacity Herbicide is our most popular product for eliminating bentgrass from other desirable turfgrasses, but it does typically require multiple applications. Late summer/Fall applications will be more effective than Spring applications.
Tenacity will help control annual bluegrass (poa annua) from germinating in the Fall, but it will not interfere with new plantings of Kentucky Bluegrass. If you are putting down any new seed, apply Tenacity as close to seeding as possible. If you have new KBG seedlings coming up already, then wait to apply Tenacity until after the new grass is established (2 mowings or four weeks, whichever is longer).
You could potentially mix Tenacity Herbicide with other products as long as you follow both product labels to be sure you are using the correct rates for the area you want to treat. We also recommend checking the labels first if you are planning on seeding or have recently done so. We also suggest a small jar test before mixing a large batch to check for compatability.
No, Tenacity Herbicide will not kill or eliminate orchard grass, quackgrass or tall fescue.
If it takes one gallon of water to cover 1,000 sq ft then use one gallon of water to the appropriate amount of products. If it takes 2 gallons of water, you will still use the same amount of Tenacity and surfactant. The water is the carrier so that amount of product is applied over the full 1,000 sq ft.
Tenacity Herbicide can take multiple applications to be most effective. It does not require irrigation after application for post-emergent weed control. Are you mixing a surfactant like Non Ionic Surfactant? This helps the product to stick and penetrate to the xylem of the plant best. Be sure the target weeds are listed on the Tenacity product label.
You can mow 2 days prior to application and 2 days following application of Tenacity Herbicide.
You should wait until the newly germinated turf has been mowed two times, or four weeks after emergence (whichever is longer) before making a postemergence application with Tenacity if it was not applied at the time of seeding.
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 without harming your centipede lawn. Make sure to read the Tenacity label very carefully and mix exactly what is recommended as this is a strong product and mis-using it can cause temporary turf injury. When applying Tenacity it is highly recommended to use a temporary turf colorant like Turf Mark Blue to allow you to see where you are spraying. Overlapping your application of Tenacity can cause temporary whitening of the lawn as well, but the color will return in 3-4 weeks at most. Please let us know if you have any other questions.
Tenacity Herbicide should not be used around or on desirable ornamentals and/or trees. This should not be used within 3 feet of the trees or ornamentals.
Tenacity Herbicide is our most popular product for eliminating bentgrass from other desirable turfgrasses, but it does typically require multiple applications. Late summer/Fall applications will be more effective than Spring applications.
Yes, chelated iron can be used after using Tenacity Herbicide
Tenacity Herbicide is one of the few products that can be applied at seeding, prior to seeding, or just after seeding of new grasses to help prevent and control weeds at the same time. Be sure to check the label for any restrictions to certain turf types as Fine Fescue is more sensitive than other species when using Tenacity at seeding. Be sure to use a Non Ionic Surfactant with Tenacity when applying for best results.
As a pre-emergent, Tenacity will only last about 30 days, so you may re-apply after 30 days if necessary making sure you do not exceed the max application rate per year. However, the product label states “If used for preemergence in established turf, tank mixtures with preemergence herbicides such as Barricade® 65WG Herbicide are recommended for longer residual and broad spectrum weed control.”
Tenacity Herbicide would be best applied in temperatures below 80 degrees.
