The Anderson's Turf Fertilizer 13-2-13 is designed to promote a healthier turf and to help improve the turf areas on both warm and cool season turfgrasses. According the manufacturer's product label, this product should be applied only as directed during the growing season.
For additional information on appropriate timing for all of your lawn applications, you can also refer to our Lawn Care Schedule for Warm Season Grasses.
The Anderson's Turf Fertilizer 13-2-13 states on the label it needs to be watered in after the application. It does not provide specific time frame so in this case we would suggest right after application or within a few days for the product to start working