For best results, apply Lilly Millers Moss Out. For roofs and structures just prior to the time when fall rains begin or in early spring. Moss growth can occur in nearly any location where dampness persists. Such areas include roofs, decks, steps, patios, walks, fence posts and foundations. Since moisture is essential, most moss growth appears during the fall, some in the winter and in the spring. Very little moss forms in summertime. Destroying existing moss is done most effectively during times when its growth is most rapid and when rain is not expected for several days. Controlling moss may add months or years, of service to roofs, patios and such areas.; ; Brand Name: Lilly Miller Sub Brand: Moss Out Targeted Weed: Moss Product Type: Killer Product Form: RTU Liquid Container Size: 54 oz OMRI Certified: No Organic: No Coverage Area: 1000 sq ft Rain Proof: No Packaging Type: Bottle Primary Active Ingredient: Ammoniated Soap of Fatty Acids Application Season: All Season Control Type: Selective Pre/Post Emergent: Both Type of Weed: Moss Application Location: Driveway/Patio