Cost of shipping a dimensional object wide makes this something to make on site. A roll bender, 2 steel pipe and 6 pvc pipe are the main materials. The larger the diameter the higher the yield in the area.
The Garden Tower grows plants vertically, enabling you to grow 50 plants in a very small space -- the ultimate square foot garden with integrated composting! Most container gardens only allow planting on the top. The Garden Tower has 45 openings around.