Esther from Tolleson, Az writes
Typically a pre-emergent like Pin Dee 3.3 T&O Herbicide is applied at least twice a year depending on your region and the program you are following. Spring and fall are the usual times to apply. We do have general lawn care schedules here that may be helpful. Please contact your local cooperative extension office to determine the most exact timing of application as this will vary greatly from region to region.
Answer last updated on: 11/10/2019
