Tenacity Herbicide can be applied in the summer and works best on crabgrass that has just emerged up to the 4 tiller stage. Keep in mind that the best temperature range to apply most herbicides, including Tenacity, is between 65-85 degrees. We recommend early morning or late evening applications to avoid damage to your lawn.
Tenacity Herbicide should be used with a Non Ionic Surfactant and per the product label, better results are achieved in late summer early fall applications just prior to onset on renewed bentgrass growth than spring/summer applications.
Tenacity Herbicide is labeled safe for fescue lawns however can ONLY be applied to bermuda turfgrass when it is dormant without the risk of injury. Tenacity can be used for pre and post emergent (with Non Ionic Surfactant) control of clover but will only suppress poa annua, it will not fully control it.
Since poa annua and cool season grasses are so closely related, there are few products that will kill the poa annua without also harming the lawn. For Poa Annua in cool season turfgrasses, we recommend a spot-treat with a Roundup-type product and then reseed with the desirable grass type in those areas.
Applying a pre emergent like Pendulum 2G or Dimension 2EW in late fall and early spring to prevent weeds like poa annua, clover, crabgrass, and many other grassy and broadleaf weeds from germinating is also helpful.
Please view our Lawn Care Schedule Calendar for more information.
The product label advises on waiting 7 days after applying Tenacity Herbicide if you will be applying an organophosphate or carbamate insecticide as it could cause potential injury to the turf. Other insecticides not in either of those classes would be fine to apply 24 hours after the application of Tenacity.
For example, Bayer's Dylox 6.2 Granules or Dylox 420 SL both have an active ingredient of Trichlorfon which is considered an organophosphate, therefore you should wait the window of at least 7 days before you apply Dylox 6.2 or Dylox 420 SL to the area that has been treated with Tenacity Herbicide. Other examples of organophosphate or carbamate insectides contain Malathion, Parathion, Diazinon, Fenthion, Dichlorvos, Chlorpyrifos, & Ethion.
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 Herbicide is best applied either 2 weeks before seeding or 2-3 weeks after seeding to prevent injury for Centipede lawns.
Please view the full product label for more information.
Yes, Tenacity Herbicide is labeled to control veronica speedwell. Please refer to the product label for the recommended rates for your specific turfgrass.
Depending on what type of grass type you have, you will need to use anywhere from 5 to 8 oz of Tenacity Herbicide per acre or 0.11 to 0.18 oz per 1,000 square feet. The product labels states to use a minimum of 30 gallons of water per acre (0.69 gallons of water per 1000 sq ft) for adequate coverage therefore we recommend making your application at 3 mph or contacting the sprayer manufacturer for tips on adjusting to your needs.
Please review the Tenacity product label for the recommended rate for your turfgrass and complete instructions.Tenacity Herbicide should be applied on a non-windy day as directed on the label.
For best results, do not apply Tenacity Herbicide when rainfall is forecasted to occur within 24-48 hours. However, Tenacity Herbicide will be rainfast 4 hours after it has been applied or after it has dried.
We would not recommend tank mixing Tenacity Herbicide with other herbicides like Empero when applying as a post emergent application. Tenacity is only labeled for spot treating when applying to actively growing weeds where others allow for broadcasting an area. Tenacity is only broadcasted when applied as a pre-emergent application.
You do not have to remove dead plant matter after using Tenacity Herbicide. However if you plan to overseed, then it is a good idea to rake out dead plants since you may need to dethatch or aerate before putting down your new seed.
For post emergent applications with Tenacity Herbicide with adding a Non Ionic Surfactant, the product label states to wait until the newly germinated turf has been mowed two times or four weeks after emergence (whichever is longer) before treating actively growing weeds.
For pre emergent applications with Tenacity Herbicide, apply Tenacity before or at the same time of seeding for best results. The key time to avoid spraying Tenacity on new seedings, either as a pre-emergent or a post-emergent, would be when the new seedlings have started to come up but are not yet established.
Please refer to page 12 of the product label for complete application instructions around seeding.Tenacity Herbicide cannot be used on home lawns that have St Augustine. It is only for use on St Augustine in sod farms.
Tenacity Herbicide is not specifically labeled to treat deer tongue grass.
No, Tenacity Herbicide should only be applied to the turf grasses listed on the product label. For nutsedge in landscaped areas it is recommended to spot treat the sedge with a glyphosate or Round Up type product directly. We recommend Roundup QuickPro 1.5 oz. packs for ease of use.
It is not recommended to use a hose-end sprayer to treat your lawn with Tenacity Herbicide or any other herbicide. The problem with using hose-end sprayers is that they are not very accurate, and you can wind up dispensing more or less product than recommended per area. This can lead to less than desirable results.
Tenacity Herbicide is not labeled to treat beggarweed. Fertilome Weed Free Zone is labeled to treat beggarweed on listed grasses. Please see the product label for complete application instructions.
