In search of water, the surface roots of two liquidambar trees broke
through a sloping front lawn. The owners asked San Francisco landscape
architect Emery Rogers to control these invasive roots and root sprouts and also to define the entry better.
Rogers’ solution: bury the surface roots by raising and
leveling part of the lawn. He added a low brick retaining wall that
curves around one of the trees, then back-filled against it. Layers of
benderboard form a lawn barrier near the other tree.
To water deep roots. Rogers sank several 3-foot lengths of
gravel-filled 4-inch perforated pipe. The brick walk broadens at a
14-foot-wide center section designed for large containers of annuals and