1. A vertical growing system for cultivation of plants, the system comprising: (a) a plurality of trays structurally configured for growing plants therein; (b) a tray suspension system to which the trays are adjustably affixed one above another, wherein: (i) the tray suspension system comprises a drive train and means for adjustment of the vertical position of the trays to the drive system, and has a singular access point for user access and manipulation of the trays; (ii) the spacing between the trays in the suspension system is adjustable to vary the amount of light passing through the tray suspension system to surfaces behind the tray suspension system; and (ii) the tray suspension system is configured to allow natural lighting to pass to the plants growing in the trays; and (c) a water distribution system comprising a reservoir, a pump, and a water supply tube, the water distribution system providing a flow of irrigation water to the plants growing in the trays, and drainage of excess water from the trays.