How to Build a Retaining Wall for Landscaping

HGTV expert Justin Cave shows how to build a retaining wall using architectural blocks or cinder blocks. Architectural blocks are the easiest to use because they have a built-in lip that holds them in place. Cinder blocks will require mortar and may also require rebar reinforcement. Retaining walls can be made form landscaping timbers, but these may require extra engineering work and are probably best left to professionals.