When selecting wood for urban planter boxes, sustainability hinges on the wood's source, durability, and treatment. The most sustainable options are woods that are both long-lasting and responsibly harvested.
Look for wood certified by the Forest Stewardship Council (FSC), which ensures it comes from responsibly managed forests. In terms of species, naturally rot-resistant woods are top choices as they last for years without chemical treatments. Cedar, particularly Western Red Cedar, is excellent for its natural resistance to decay and insects. Redwood is another superb, durable option, though its availability from sustainable sources is crucial.
Reclaimed or recycled wood is arguably the most sustainable choice, giving old material a new life. Avoid woods treated with toxic chemical preservatives, which can leach into soil.
Ultimately, the most sustainable wood is FSC-certified, naturally durable, and ideally local or reclaimed, ensuring your urban garden is both beautiful and environmentally sound.