Composite landscape timbers are made of recycled polyethylene and wood fibers, or recycled plastic. The timbers are lightweight and durable. Some styles have interlocking channels for stability and preformed holes for reinforcement bars.
About this Author
Melody Lee worked as a newspaper reporter, copywriter and editor for 5 years. In addition, she has edited magazine articles and books. Lee holds a degree in landscape design and is a Florida master gardener. She has more than 25 years of gardening experience, which includes working at nurseries and greenhouses.