Melanie from Tarrytown, New York writes
Scotts Halts Crabgrass and Grassy Weed Preventer needs to be watered in with 1/2" of water within 12-24 hours of application to ensure the product penetrates the soil. You can contact the manufacturer directly with specific timing questions not listed on the product label at 1-800-270-3714, or via their website's contact page here.
Answer last updated on: 04/18/2021