Banish moss and grow a lush lawn with the help of Scotts Turf Builder Triple Action for Moss Control. This 3-in-1 lawn care product for lawn maintenance kills moss, feeds grass for a healthier, greener lawn, and thickens grass to help protect against future problems. Scotts Turf Builder Triple Action for Moss Control is for use on most grass types. DIY homeowners should apply it during winter or spring when moss is actively growing. It is best applied when the lawn is moist and tall grass has been mowed to expose low growing moss. We recommend using a Scotts fertilizer spreader to apply this product. For Scotts broadcast/rotary spreaders, use a setting of 5 for the regular rate or 5 3/4 for the heavy rate. For Scotts drop spreaders, use a setting of 8 for the regular rate or 8 1/2 for the heavy rate. For Scotts Wizz, use a setting of 5 for the regular rate or 5 1/2 for the heavy rate. Grass blades may temporarily turn black after application; however, this condition will disappear after mowing. Always wait 6 to 8 weeks between applications. One 20 lb. bag of Scotts Turf Builder Triple Action for Moss Control covers up to 4,000 sq. ft.