Choose rot-resistant woods like cedar, redwood, or cypress for planter boxes. These types of wood naturally resist decay, moisture, and insect damage. Avoid using treated lumber, as the chemicals may leach into the soil and harm plants. For a budget-friendly option, pine can work if properly sealed, though it may not last as long. Ensure the wood is thick and sturdy to handle soil weight and weather exposure. Reclaimed or upcycled wood can be used, but make sure it’s free from harmful substances and not treated with creosote or other toxic chemicals.
