Vipul from Ma writes
Per the product label on QuinKill Max Crabgrass and Weed Killer, if soil moisture is not sufficient prior to application irrigation may improve weed control. For best results, DO NOT water or irrigate for 24 hours after application. If rainfall does not occur in 2 to 7 days after application, irrigation of at least 1/2 inch is desirable.
Answer last updated on: 05/10/2017