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.
Pine is not the best choice, however, because it is a soft wood and will not last as long as other woods. Cedar is a better. Composite Raised Garden Beds.
A raised garden bed is a large planting container that sits aboveground and is filled. Although pressure-treated wood is certified as safe for organic growing, .
Gardeners have used pressure-treated wood for decades in raised beds and as posts, but on December 31, 2003, the Environmental Protection Agency (EPA) .
Building the Garden Bed. Wood and Concrete Wall Block Raised Garden Beds. The bed frame can be as simple as 2 x 4s on top of the ground, or even patio .