Kill moss, not your lawn with Scotts Turf Builder with Moss Control. This lawn care product kills moss and feeds your lawn to help fill in bare spots and thicken grass, all in an effort to make moss a problem of the past. Apply the combination moss killer and grass fertilizer during winter or spring when moss is actively growing. Ideal for use on most grass types and is best applied when the lawn is moist and tall grass has been mowed to expose low growing moss. Manufacturer recommends using a spreader to apply this product. For Scotts broadcast/rotary spreaders, use a setting of 5 for the regular rate or 5 for the heavy rate. For Scotts drop spreaders, use a setting of 8 for the regular rate or 8 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.