Decking lumber is used as ground level edging against a manicured lawn. Decks are an option for a garden design where otherwise there is no usable space. It can be tied to a building or a freestanding surfacing material.
Ceanothus griseus hor. 'Yankee Point'z Low growing (under 3 feet) CA native lilac. Has a spread of 6 feet. Fast growing. Evergreen "mound" with clusters of small, bright blue flowers in the spring. Does well along the coast and even inland. Drought tolerant.