Tenacity Herbicide should be used just before the soil temperatures reach 55 degrees in early and late fall. Please contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region.
Tenacity Herbicide does not list English ivy on the product label, but it is labeled to kill ground ivy so we would not recommend applying it to any desirable ivy.
Products that have been mixed with water must be used within 24 hours after mixing. Please contact your Local Sanitation Dept for guidelines in your area on disposal of unused Tenacity Herbicide .
Yes, the product label for Tenacity includes a chart that lists each of the weeds controlled by their common name and scientific name. It also lets you know if the weeds can be controlled in their pre-emergent or post-emergent stage.
If you are applying Tenacity Herbicide as a post-emergent, then you would apply when the target weeds are actively growing. Keep in mind that Tenacity is most effective in young crabgrass, so it may require more than one application to control mature crabgrass. If applying as a pre-emergent, then you usually apply just before fall overseeding and before soil temperatures drop below 70 degrees.
Tenacity Herbicide is not labelled to control or suppress bindweed (creeping jenny). Quinkill Max (Drive) can be used for bindweed on most types of turf (not St Augustine).
Spray foliage of target weeds with Tenacity Herbicide until wet but not until the point of runoff.
Tenacity Herbicide is not labeled for use on a dichondra lawn, and it is not labeled for spurge. Dichondra lawns are considered a type of ground cover, and many herbicides may prevent this type of lawn from growing. Please contact your local cooperative extension office Master Gardener for assistance on products that will take care of the weeds in your lawn without causing harm. Please let us know if they suggest a product, and we will certainly make an effort to locate it for you.
Tenacity is not labeled to control undesirable ornamental plants, although it may harm them if sprayed accidentally. You will need to remove physically all the parts of the iris - including the rhizomes in the soil – in order to prevent these plants from regrowing the following year. You can use a glyphosate product such as RoundUp QuikPro to kill the above ground plants, but you will need to remove the rhizomes after spraying. This article has easy-to-follow directions on this treatment, which is best done in the fall.
Due to the strength of Tenacity, and the need to not over apply or overlap with it during application to avoid discoloring or excess stress to the desirable turf grass, we do not recommend mixing other post emergent herbicides in the same tank with it unless stated on the label. Tenacity should be applied with a Non Ionic Surfactant and a temporary marking dye like Turf Mark Blue to ensure no overlapping occurs to cause your turf to whiten. We would recommend applying the Triad Select in a separate application. Should you decide to try tank mix the two, we recommend doing a tank mix test first for compatibility, and test a small area to ensure safety to the lawn. Though be aware Tenacity is not labeled to effect bermuda at all.
If applying Tenacity Herbicide as a pre-emergent you would want to apply after applying any top soil to other matter to the top of the soil to prevent weeds growing in the new soil
You will need to wait one year after Tenacity is used in a given area before you can plant edible vegetation in that area.
You should not mow within 2 days before or after an application of Tenacity Herbicide or any other herbicides.
When using Tenacity, 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.
As long as the initial application of Tenacity Herbicide has had a chance to dry after a post emergent application it will not be washed away with rain after. Best to apply when no rain is expected within 24 hours to be sure.
If the Tenacity Herbicide application had enough time to completely dry before the temperatures spiked to 93 degrres, there shouldn’t be any issues. It is recommended to apply Tenacity when temperatures are between 65 to 85 degrees so early morning or late evening applications may work best if temperatures above 85 degrees during the day are expected. If any yellowing or discoloration occurs, the turf should recover after a couple weeks.
Tenacity is not labeled for use around anything edible so we cannot recommend it be used in an orchard. We apologize but we do not currently have a product labeled for control of nimblewill in orchards. However, you can click here and contact your local cooperative extension office to speak with a Master Gardner to find the name of a product and then contact us to see if we have access to that product.
