Marc from Jacksonville, Fl writes
Speedzone Southern Herbicide is a post emergent herbicide which means it should only be applied to weeds that are actively growing and when soil temperatures are above 60-65 degrees. As long as the weeds are actively growing and have not entered the dormant state then you should see results with the product if you choose to apply it now. Otherwise you would want to wait until it warms up more in the Spring.
Answer last updated on: 01/13/2016