Complete, detailed how to make a wooden planter box instructions are here. This sturdy deck planter has a clever design so it can rest securely on a 2×4 or 2×6 deck railing or sit on a patio, porch or ...

In general, you don't need to treat cedar planter boxes before placing them outside. However, if you don't pretreat your cedar planter box, you'll probably notice some visible changes in the wood.