Denis from Portsmouth, Va 23703 writes
I have read the pamphlet that came with the product and I have yet to find a minimum application temperature. It is October and the days are cooling. I expect that year-round use may not be possible.
Roundup Pro Concentrate as well as most herbicides on the market are going to be most effective when the weeds are in an actively growing state, and ideally when soil temperatures (not air temps) are consistently at least 65 degrees or higher. You may still see some effects if the temperatures have dropped lower, but it may just take longer for the product to be absorbed and show the results of the application.
Answer last updated on: 10/23/2017
