Answer: Moss often appears naturally on rocks that are left undisturbed. Moss can be introduced if you can find some moss growing on the same kind of rock in a similar exposure. You can take a small section of the moss (a few inches across), and place it on the new rock, pressing it into place. You can also break it up and sprinkle it on the new location. Mist daily and it may "take". Some gardeners will also mix the moss with live-cultured yoghurt or buttermilk in a blender (use an old one!) and then spread that on the rock. (This helps it stick.) In my experience, unless you have a good match of growing conditions, moss will not transplant.
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