Tenacity Herbicide is labeled to be safely applied to fine fescue and is not labeled to kill it so we cannot recommend it for that use. When you are trying to remove another cool season turf type from KGB the best option is to use a product like Roundup Quikpro (or non selective/glyphosate) and then re-seed with your KBG.
Tenacity is not labeled to control cheeseweed. The herbicides we carry that are labeled to control cheeseweed are Spectracide Weed and Grass Killer With Extended Control RTU, Goal 2XL Herbicide, Ronstar 50 WSP, and Aim EC Herbicide.
No, Tenacity Herbicide is not labeled for application to bahia.
There are no time restrictions when applying Tenacity Herbicide along with insecticides or fertilizers. You can either spot treat or broadcast depending on how much of the target weed you are dealing with.
No, you should not use Tenacity Herbicide on or around desirable ornamental plants or groundcovers, such as liriope. Please let us know what weeds you are targeting so that we can recommend an alternative product for you.