After you have mowed the lawn (2 inches, or 4.5 centimeters, is an ideal height for top dressing) and, when needed, have performed core aeration and over seeding, fill up the Ecolawn hopper with compost or a compost blend. Propel the spreader to the farthest section of the lawn and spread the material in a consistent pattern. Repeat this process until the entire lawn is amended. For quick activation, water the lawn for the next two days.