At our planter box factory, wood selection for outdoor use in wet climates starts with decay resistance, dimensional stability, and how the finished box will drain. Our standard outdoor line is built from western red cedar because it naturally resists rot, remains lightweight, and ages gracefully in damp conditions. We select clear or tight-knot boards, kiln-dry them to a stable moisture content, and use heartwood-rich stock where possible. For customers who want a more premium option, we use teak or ipe; both are dense, naturally durable, and perform well under repeated wet-dry cycles, though they require sharper tooling and stainless fasteners. Cypress is another strong choice in humid regions, especially for painted or stained boxes. We also work with thermally modified wood, which uses heat and steam rather than chemicals to reduce water absorption and improve durability; it is a good fit for buyers seeking a non-treated, dimensionally stable product. Pressure-treated pine is available when budget or structural requirements call for it, but we specify appropriate treatment ratings, use liner barriers, and warn against direct contact between treated wood and edible plants. No wood survives forever if water sits inside a planter, so our wet-climate boxes include raised feet, drainage holes, slatted bottoms or drainage layers, and optional liners. We fasten with stainless steel or hot-dip galvanized hardware, seal cut ends, and finish with breathable water-repellent coatings rather than heavy films that trap moisture. The exact species depends on budget, appearance, weight, and project location, but the factory's default recommendation for wet climates is western red cedar, with teak, ipe, cypress, and thermally modified wood as proven upgrades.