If desired, paint or stain your planter. For a natural look that emphasizes the planter's wood grain, apply three coats of spar urethane with a bristle brush. Allow appropriate drying time and lightly sand between coats.
Planters are designed to fit around a plant that is already in a pot. We kept the bottom open for each drainage. For a taller planter, stack two hexagon planters on top of each other and secure with wood glue.