How to Grow Moss on a Wall

Monitor the section of wall where you would like moss to see how much sun it gets during various times throughout the day. Check both sides of the wall; you can plant moss to wander over the top of a wall and down the other side. Choose an area that remains in partial or complete shade.

Dig up a patch of moss from your own property or an accessible area nearby. If there is no available moss, purchase moss at a nursery or buy it online.

Place the moss in a blender with a small amount of water and blend until it forms a thick soup. The amounts can vary -- start with a handful of crumbled moss and an equal amount of water. Experiment with adding moss for enough body so it will stick to a wooden spoon. For greater adhesion to the wall, use 1 cup or more of buttermilk or yogurt instead of water, but add some water if the mix is too thick. Yogurt or buttermilk and moss will adhere to most stone or stucco walls. Water with moss may be enough for a rough-textured wall.

Paint the moss soup on the wall using the paint brush. Slop it on generously, not too thin, so that the area is well-covered but not dripping globs of moss slurry.

Keep the moss "garden" watered until you see thickening patches of green take over. This can take several weeks. Once the moss is established, it will draw moisture from the environment as long as it remains shaded. During drought conditions, continue to mist and water the moss so it won't dry out.