There's more to a cultivated country spread or city terrace garden than the plants. People increasingly see their gardens as outdoor rooms, and they want to furnish and decorate them as attractively and comfortably as any other part of the home. Who doesn't dream of having coffee on the garden bench, eating lunch at a handmade picnic table, or snuggling with a lover under an arbor in the moonlight or in a gazebo during a thunderstorm? Readily available,...