Tenacity Herbicide states on the product label: Avoid applications over the top of exposed roots of trees and ornamentals. Just about all herbicides are going to have the restriction that applications should be kept out of the dripline of desirable trees. The best you could do is carefully spot treat the weeds themselves and not broadcast in these areas.
Tenacity Herbicide is only labeled to be applied to dormant bermudagrass, it could harm actively growing bermuda or inhibit seeds from growing. You need to wait at least 18 months to seed the area after an application
Per the Tenacity label, you will not exceed 5 fl. oz. of product per acre for fine fescue. This is just the max amount that should be used per year and per acre. The rate that should be used is you will need to mix 0.5 tsp of Tenacity and 1.5 tsp of surfactant to one gallon of water covering 1,000 sq ft. Also, Tenacity should NOT be applied at the time you are putting down new seeds or overseeding. This will likely inhibit their growth. You will want to wait until the lawn has been established before applying this product for pre-emergent control. This is generally after three mowings. There are no restrictions for Tenacity with regards to post-emergent control of weeds.
When using Tenacity Herbicide a broadcast application would be considered spraying over the entire lawn area. A spot treatment is used when you only have certain spots or areas that need to be treated versus the entire lawn. For most post-emergent applications with Tenacity, you will just spot treat to avoid whitening the desirable turf. Please follow the specific directions on the product label for your needs.
Tenacity Herbicide can be applied any time before the weeds start to germinate. Weeds absorb Tenacity as they emerge from the soil. For the best time to apply pre-emergents in your county we recommend contacting your local cooperative extension office here. Crabgrass seeds will start to germinate when soil temperature are around 55 degrees, so you need to apply it before you have those temperatures for best results.
Since quackgrass is not on the label to be controlled by the Tenacity, we cannot recommend you use it for this application. We do, however, carry Certainty, which is a selective post-emergent herbicide like Tenacity, that does have Quackgrass listed on the label under weeds controlled. You can see the dilutions and what grasses are tolerant of Certainty on the product label.
No, Tenacity Herbicide is not labeled for spurge.
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. If you are able to spot treat with RoundUp QuikPro, that is another option. It would still be ideal to wait at least 10-14 days after applying the Roundup QuikPro before raking out the dead plants and re-seeding those areas.
You can reapply Tenacity Herbicide after 2-3 weeks for post emergence control of actively growing weeds for best results. There should not be an issue applying lime after the application. We would encourage you to get a soil test to determine the pH level of the soil you are treating also. This can be done at your local cooperative extension.
Tenacity Herbicide should be applied before soil temperatures reach 55 degrees if using as a pre-emergent. If as a post you would apply when the target weeds are actively growing and healthy.
Per the manufacturer, " Tenacity has been tested in tank mixtures with Barricade 65WG Herbicide (prodiamine), Vanquish® (dicamba), Turflon® ester (triclopyr), Spotlight™ (fluroxypyr), Quicksilver™ (carfentrazone), Basagran® (bentazon), Princep® (simazine), and AAtrex® (atrazine) for safety and efficacy on turfgrasses. Tenacity must be applied at reduced rates (4 fl. oz./A or less) if tank mixed with atrazine, bentazon or simazine. Other tank mixture partners may be safe but have not been tested. Turf managers wanting to tank mix Tenacity with other herbicides should test on a small basis for compatibility, safety and efficacy before treating large areas. See product labels for directions and precautions."
Tenacity Herbicide is not labeled for sandspur. We suggest Pastora Herbicide instead. It is labeled to control sandbur aka sandspur when used as directed on the product label for post or pre emergent control
Tenacity Herbicide is not labeled to control poa annua/annual bluegrass as a post emergent application and will only suppress poa annua when used as a pre-emergent.
It is recommended that you do not mow 2 days before or 2 days after the application of Tenacity Herbicide.
Tenacity Herbicide is not labeled to control orchardgrass. Unfortunately, we do not know of any selective herbicide that will kill orchardgrass without harming your desirable turfgrass. It is usually recommended to spot treat the orchard grass as much as possible with a non-selective product like RoundUp QuikPro, and then replant in those areas in a couple of weeks when the orchard grass is gone.
Tenacity Herbicide is not an organic pesticide. Organic pesticides are made from naturally occurring ingredients. Non-organic pesticides are created synthetically.
Post-emergent herbicides like Tenacity Herbicide work best when the target weeds is young and actively growing and temperatures are between 65-85 degrees..
Yes, Tenacity is labeled for post-emergent control of wild violets.
