Steve from Ca writes
It is always best to perform any type of maintenance such as dethatching before you put down a pre-emergent like Prodiamine 65 WDG (Generic Barricade) so that you do not interrupt the barrier and, therefore, get inconsistent weed control. You could potentially dethatch with a hand rake after watering in the Prodiamine application with at least 1/2 inch of water. Allow that watering to dry completely before dethatching.
Answer last updated on: 02/25/2019
