I've read here that the best time to apply herbicides for turf weeds is when the lawn needs cutting. Reason being is there is more weed present that can absorb the chemical. However, I asked my new lawn care contractor this question and he said right after a lawn has been cut. He feels that the blades are open and more vulnerable to the herbicide. He likes to hit the lawns no later then 3 days after a lawn has been cut. You're thoughts???