Check the listing for details. Moss Crete - Naturalistic Stone Cement Blend for Growing Moss. Condition: New. Listed at 19.95 USD. Specialized cement mix for creating rustic aged statuary. We start with a classic "hypertufa" mixture and add extra peat moss, live moss spores, and an acidic base to lower the PH and support healthy moss growth. The results are ancient looking, verdant stone sculptures which are sure to add serene charm to your garden space. To use: 1.Stir the cement mixture into a large bowl or tub. Add just enough water so that when you form a ball in your hands and squeeze it, it holds its shape and little or no water drips out. 2.Pack the mixture into your desired shape, generally using a mold such as a box or bowl. Try to make the walls of your structure at least 2 inches thick. 3.Wrap your shape in plastic and keep in a shady location overnight. Remove the plastic and allow to cure for another few days before displaying/planting.