Rocks and boulders add to the naturalism of a garden. From a small rock on the edge of a path to large boulders used for a waterfall they all help make a garden beautiful.

Many beautiful lichens and mosses grow on rocks. In the summer you can bring them to life by spraying them with water.
The top photo was taken before water was sprayed on it. The second photo was taken 1 minute after spraying with water.