If you want to meet this high standard, choose a different material. Until the safety of treated wood is proven conclusively, we recommend you use a naturally rot-resistant wood like red cedar, black locust or redwood. Under most circumstances, these woods will last 10 â€“ 20 years when used for raised beds.
Wood options for Raised Garden Boxes. Redwood or Black Locust â€“ Definitely the best option for raised garden boxes in terms of longevity because they are naturally rot-resistant and have been known to last up to 20 years. Cedar â€“ Another rot-resistant wood, cedar can last 10-15 years and looks gorgeous.
Best Wood for Raised Beds. Many people are concerned about the safety of their wood frame. First, rest assured that CCA pressure-treated wood is banned, .
Building the Garden Bed. Wood and Concrete Wall Block Raised Garden Beds. The bed. Untreated lumber isn't rot-resistant, but it's a good option for edibles.