Just add a few cups of water to a bucket, stir in the contents of this carton, and let stand for ten minutes. Then find a shady area and spread the gel-like paste over any surface – bare soil, stone, wood, or weathered concrete. Even vertical surfaces! Each small moss fragment will grow into a new moss plant, which then grows together over time to form a dense green blanket. The Moss Milkshake has an indefinite shelf life, and will cover up to 20 square feet of surface. All you need is shade, moisture, and patience!