Outdoor planter boxes can be made of resin and mounted on legs with a convenient shelf beneath. Other raised planter boxes are made of cedar. They can be square or rectangular, made of molded plastic and come with their own sub-irrigation water systems. Others have the look of wood boards nailed together but are actually made of weather-resistant plastic.
Planters are also made out of cement cubes or plastic made to look like cement or brushed metal. Other planting boxes are tapered toward the bottom, and come in rich colors with interesting patterns, while some resemble troughs, are made out of wood, have wooden legs and are painted with weather-resistant paint. Other planters are austere rectangle made of equally austere steel, while others are built to sit on a deck rail.
Some planters are made of polyvinyl chloride with protection against the sun's damaging ultraviolet rays. These boxes are fairly maintenance-free and easily to wash down with a hose. Some planters are window boxes made of polyethylene plastic with double walls and have a sub-irrigation system. Other window boxes are made of patinaed copper, with rounded sides. Some planter boxes are made of reclaimed wood that have been hand-waxed and given an oxidized finish.