Tim writes
We would not recommend tank mixing the SpeedZone Lawn Weed Killer Concentrate and Tenacity if you are using Tenaicty as a post emergent. Tenacity requires a non ionic surfactant to be added if being used to treat actively growing weeds and since a surfactant is NOT recommended with Speedzone, this could cause injury to the lawn. If Tenacity is being applied for pre emergent applications, you can tank mix these two after a small compatibility test is done to ensure they mix properly.
You can use Speedzone Speedzone the same day as Tenacity Herbicide for more broadleaf weed control. Just allow areas to dry between treatments.
Answer last updated on: 07/09/2021
