Enough stress cannot be placed on the importance of proper watering to ensure the effectiveness of any pesticide application. As Turfmaster has no control over your watering system, this must be the homeowner’s responsibility. Furthermore, it is simply impossible for Turfmaster to be at each of our customer’s houses on their watering days. The pesticide manufacturers understand this, so the label states that you have a 48 hour window to water in these products. After 48 hours the effectiveness of the treatment diminishes greatly.