<p>The small but mighty <strong>GRO Products Vertical GRO System with Planter Box</strong> has a small footprint, yet offers big changes in your gardening. This vertical planter box boasts a durable frame made in the USA from western red cedar. It's naturally resistant to decay, rot, and insects. The wooden planter boxes are adjustable to accommodate different plant heights. This vertical planter box includes heavy-duty plastic liners with interlocking reservoir bottoms that provide a barrier between the soil and cedar. All assembly hardware is included. Make this vertical system planter box mobile by adding on the optional casters.</p>