Protects and strengthens for a better spring lawn. Apply to a wet or dry lawn on a calm day. No need to water in, however, during dry periods, watering will hasten greening. For best results, apply using a Scotts spreader. Any time in the fall. Fall is the best time to feed. For your best lawn, feed once in early Fall and 6-8 weeks later in late fall. Safe to use on any grass type. Safe to walk on lawn immediately after application.