Tenacity Herbicide is only labeled to be used on Bermuda when it is dormant, otherwise it can be sensitive to applications and could harm it. Since Tenacity Herbicide can be used only on fully dormant Bermudagrass, there is not a time when you would be overseeding and using Tenacity at the same time. You would overseed with Bermuda when the turf is actively growing in spring or summer, if needed at all. So if you applied Tenacity on dormant Bermuda, then it would be long gone by the time the turf is completely green and any seeding would be done. If you would like to tell us more about the weeds you are targeting, then we can recommend alternate products for your needs.
Tenacity Herbicide should be applied on a non-windy day as directed on the label.
To control nimblewill, start applying Tenacity in the spring (late-April) with a nonionic surfactant. You will need to make two or three applications 2-3 weeks apart. You will use it at the 5 oz per acre rate per the label. The product does have a yearly maximum use rate, and the label states "do not apply more than 16 oz of Tenacity per acre per year or per crop (equivalent to a maximum of 0.50 lb of mesotrione per acre per year).You can also apply Tenacity in late summer and fall, but you should initiate them by August for best results. Good cultural practices on your lawn can help reduce its ability of coming back as well.
It would be best to wait to apply Tenacity Herbicide until the grass has completely dried before the application. Be sure to mix in a Non Ionic Surfactant when doing post emergent applications.
Tenacity Herbicide can be applied at the same time as seeding (unless grass is more than 20% stand of fine fescue). If application cannot be done within 7 days of seeding you would need to wait a minimum of 30 days, or until the seed has emerged and been mowed at least twice before applying to the lawn.
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.
Ideally, you would not want to put a fertilizer down when the lawn is getting ready to go dormant. If anything, an application could be made now in early October as your last treatment for the year. Tenacity would not be effective on lespedeza (japanese clover) at all as its not labeled for it. Southern Ag Atrazine is labeled for lespedeza and is safe for use on Centipede lawns if used as directed. Another option is Fertilome Weed Free Zone.
Tenacity Herbicide is not labeled for clump fescue, and it is safe for tall fescue.
You would want to wait 24 hours after the application of 1 product before applying the second product.
Tenacity is not labeled to be used on bahiagrass. The most effective product to control Nimblewill pre-emergently has been removed from the market (MSMA). We have had a lot of folks report that Dimension does a pretty good job pre-emergently but since the product is not technically labeled for Nimblewill we cannot legally recommend it for this use. The usual recommendation since the ban of MSMA is to use a non-selective product such as Round Up on the weed, wait 14 days and re-seed or sod the area.
Quackgrass is not on the label to be controlled by the Tenacity, and we cannot recommend you use it for your needs with it not being listed. We do however carry Certainty, which is a selective post emergent herbicide like Tenacity, and does have Quackgrass listed on the label for weeds controlled. You can see the dilutions and what grasses Certainty is safe to be used on, on the product label.
According to the Tenacity product label you can apply prior to seeding or post seeding of tolerant turfgrass species listed on the label, except fine fescue. If you are applying Tenacity after seeding, you should wait at least four weeks or two mowings, whichever is longer, before applying Tenacity.
Tenacity Herbicide is not labeled for post emergent control of burweed.
Tenacity Herbicide is only safe to use on dormant Bermudagrass, and it will not offer post-emergent control of poa annua, per the product label. A better choice to control existing poa annua in bermudagrass would be Monument 75WG Herbicide. Be sure to use a non-ionic surfactant with Monument as well. We also recommend using a pre-emergent herbicide such as Dimension 2EW or Prodiamine 65 WDG in late Summer/early Fall for the best control of annual bluegrass. Please see our Poa Annua Lawn Care Guide for more tips and information.
Avoid applications of Tenacity? over the top of exposed roots of trees and ornamentals. Please refer to the product label for full detailed usage instructions.
Tenacity Herbicide is not labeled to control any type of wheat pre- or post-emergently. If you would like to provide more details about the type of grass you are planting and how much area you are treating, then we may be able to make a better product recommendation for you.
Per the label of Tenacity Herbicide, this product can be applied at the same time of seed, except fine fescue. It is recommended that you mow at least two days before and/or two days after.
Tenacity Herbicide is not labeled to treat poa trivialis. Please provide your desired turfgrass for an alternate recommendation. Thank you!
Per the manufacturer, Tenacity Herbicide can be used in a hydroseeding tank as long as you're able to apply at a rate of 5 oz per Acre.Water is just the carrier but you need to make sure you irrigate the herbicide well. If this isn't a possibility then we would recommend making separate applications, hydroseeding first and then applying Tenacity.
