Western red cedar is widely considered the gold standard wood for outdoor planters, and for very good reason. Cedar contains natural oils and tannins that act as built-in preservatives, making it highly resistant to rot, decay, and insect damage — without any chemical treatment needed. This means it’s completely safe to use with edible plants and vegetables, since no harmful compounds leach into your soil. Cedar is also dimensionally stable, meaning it won’t warp, cup, or crack as severely as other woods when it repeatedly gets wet and dries out through the seasons. It’s lightweight relative to its strength, which makes the finished planter easy to move around your patio or deck. And aesthetically, cedar’s warm reddish-brown tones and tight grain give it a naturally beautiful look that ages gracefully to a distinguished silver-grey if left unfinished, or holds a rich color beautifully if oiled or stained. For a project that lives outdoors year-round and is exposed to soil, water, and the elements, cedar is simply the smart, long-lasting choice.