Many cemeteries prohibit the planting of trees in order to protect the grave stones.  In order to compensate for this, many people plant gardens at the burial site of loved ones.  Frequently, these plantings often include the presence of garden wall plaques.  Today, you can obtain inexpensive plaques that depict everything from angels to chipmunks.  Depending on what appeals to you, the addition of decorative wall plaques can be a beautiful addition to a cemetery garden.