I am looking for an outdoor garden box (or cork squares), that can be attached to the exterior wall of our home. The exterior wall is coated in stucco. Once filled with plants, I would only like to see the "frame" of the box. The box size...approximately 24"x 36." I am okay with just doing air plants vs plants that require watering, if necessary. The wall area is under an over hang. Any vendors to the rescue?