Tenacity Herbicide can be applied in the summer and works best on crabgrass that has just emerged up to the 4 tiller stage. Keep in mind that the best temperature range to apply most herbicides, including Tenacity, is between 65-85 degrees. We recommend early morning or late evening applications to avoid damage to your lawn.
Tenacity Herbicide cannot be used on home lawns that have St Augustine. It is only for use on St Augustine in sod farms.
Tenacity Herbicide is best applied 2 weeks before planting/seeding a lawn or wait at least 2-3 weeks after seeding to apply. When pre-germinating and planting in the area we would recommend waiting at least 4 weeks to apply so it is established.
Broadcast treatments would be recommended if you are needing to actually treat the entire lawn for pre-emergence, if you are only needing to treat small areas or use as a post emergent then you can spot treat. Consult your local Cooperative Extension Service for more specific applications timings for your local area. Their contact information can be found by clicking the link below.
There are certain products that are susceptible to problems with high pH balances in water. If a product label does not specifically address this issue it is because this particular product does not usually have any issues with pH. The product label for Tenacity does not list anything regarding pH levels.
Once mixed with water you should use the product within 24 hours.
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.
We are not sure if Tenacity Herbicide can be applied with your handheld weed wiper. If you can apply the labeled amount over 1000 square feet with water, we do not see an issue. It would be best to also consult with the manufacturer of your Weed Wiper.
Tenacity Herbicide will harm Bermuda lawns. Please contact us at 866-581-7378 M-F 9-5PM EST for an alternative product selection that will best fit your needs. Thank you!
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.
Tenacity Herbicide is not labeled for trees so spraying around the trees could possibly harm them.
Per the Tenacity Herbicide product label, "Dormant bermudagrass applications only - Apply Tenacity at 5 fl. oz./A to control winter weeds (listed in the WEEDS CONTROLLED Table) on dormant bermudagrass. Repeat application in 2 to 3 weeks. Applications made to semidormant turf will cause whitening of the bermudagrass".