Vertical hydroponic or aeroponic structures are known in the art.
For example, U.S. Pat. No. 6,021,602 issued to Orsi on Feb. 8, 2000 teaches a modular structure for aeroponic cultivation comprising a plurality of prefabricated vertical panels which have openings in order to receive cultures therein. U.S. Pat. No. 4,869,019 issued to Ehrlich on Sep. 26, 1989 teaches a self contained aeroponic apparatus having a reservoir for containing nutrient solution and a substantially vertical support. European patent application No. 0533939 filed on Mar. 5, 1992 teaches a perforated panel that has a substantially vertical orientation with a small inclination. The holes in the panel are configured to contain absorbing tampons for water in order to support plants. International application WO 02/09500 A1 teaches a hydroponic system having a vertical wall made of hollow tubes and an irrigation system as well as modules elements for receiving plants therein. European patent application No. 1210868 filed on Jan. 27, 2000 teaches a panel for supporting plants, the panels are mounted in between guard rails, their back sides provide for exposing the roots of the plants so as to be pulverized via spray nozzles with nutrient and water, their front sides are exposed to a light source.