The amount of Tenacity Herbicide that is used is based on the amount of area you are treating. With herbicides, the amount of water is not as important as the amount of water that is being used. The rate we would recommend using is 5 fl oz to cover an acre. This can be mixed in 25-30 gallons of water to cover an acre.
According to the manufacturer, it is not advised to apply more than the recommended amount of the non-ionic surfactant. We advise you to use the ratio recommended on the product label.
We are not aware of anything that can be added to Tenacity Herbicide to cause the plant color to change as it dies and it already causes a color change itself. Per the product label: Foliage of treated weeds cease growth after application, then turn white (loss of chlorophyll) and death may take up to three weeks. A repeat application is required after two to three weeks for improved postemergence weed control. A non-ionic surfactant should be added in postemergence applications
Tenacity Herbicide does not last long as a pre-emergent, maybe about 30 days. It does state on the prodouct label also to use straight pre-emergent products like Prodiamine for long residaul control as a pre-emergent.
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.
It may be fine to mix both Tenacity and Gordon's Trimec together but has not been tested by the manufacturer. We recommend that you perform a jar test to an inconspicuous area first prior to a full application to confirm if you wish to use them both together.
Tenacity Herbicide should be used or discarded within 24 hours once it has been mixed with water.
We recommend using a Non-Ionic Surfactant with Tenacity Herbicide.
Tenacity Herbicide states the following in reference to tank mixing. We always recommend doing a small tank mix test before application.
"Tenacity has been tested in tank mixtures with Barricade 65WG Herbicide (prodiamine), Vanquish® (dicamba), Turflon® ester (riclopyr), 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"
No, Tenacity Herbicide is not labeled for spurge.
Tenacity Herbicide should be applied at grass seeding or close to seeding for best results. If you are not close, meaning within a week of application, then you would need to wait 6-8 weeks to re-seed.
Tenacity is labeled for post-emergent control of Nimblewill. Per the product label, you may need a second application after 2 to 3 weeks. Apply to young, actively growing weeds, and be sure to use a surfactant such as Southern Ag Non-Ionic surfactant for post-emergent applications. Your other option would be to use a non-selective herbicide such as Roundup to spot treat the Nimblewill to kill it directly, and then replant St. Augustine in those areas.
In general, we would recommend killing the undesirable plants and clearing out the dead plant debris before dethatching and then reseeding the lawn. Dethatching will be easier and you will get better germination with your new seed when the ground is better prepared for it. You can learn more about these treatments in our Do My Own Lawncare Video Series, too. You can find them on the bottom of our Lawn Care Guides page here.
Tenacity Herbicide can be applied at the time of seeding for all grass types except fine fescue.
Tenacity Herbicide can be used at the time of seeding or right after for most grass types. Fine fescue is the only grass seed that should not be used at the time of application. It is recommended that you wait 2-4 weeks after an application of Tenacity Herbicide to reseed with fine fescue.
This will depend on the target weed you are dealing with in the lawn. If you have a thick lawn that would prevent contact with the target weed you should mow for better contact before applying Tenacity. It is recommended not to mow within 2 days before or after applying a herbicide.
The product label for Tenacity Herbicide recommends that you avoid applications over the top of any exposed roots of trees and ornamentals. We would recommend keeping Tenacity outside the dripline of desirable trees for safety.
Tenacity Herbicide has been tested on both ine fescue (creeping red, chewings and hard) and tall fescue and found to be safe under trial conditions.
Foliage of treated weeds cease growth after application of Tenacity Herbicide, then turn white (loss of chlorophyll) and death may take up to three weeks. So, sometime within 3 weeks.
Yes, some folks do use food coloring to mark where Tenacity Herbicide has been applied. We do also carry Turf Mark Blue for this specific use.
