Rectangular Planter BoxRectangular Planter Box This Planter box is the perfect complement to your patio and gardening needs. Built from solid teak wood finished in a waterbased coat, it's a simple, beautiful yet classy design. This 36 by 18 rectangular planter box can be left indefinitely outside withstanding any type of weathering from rain, hail, wind, or shine eventually turning into a mellow grey. A strong, sturdy and heavy base guarantees the support needed for plants