Abstract: A vertical agriculture apparatus is provided, including a drive mechanism, chain tensioning mechanism, connection assembly for connecting trays to a roller chain, tray assemblies, tray hangers, and a watering system. The watering system includes seal members attached to a spring-biased moveable member that is actuated by a surface attached to a tray. The connection assembly includes a connector member defining an inner aperture for receiving pins of a roller chain and an outer aperture for receiving a bolt or rod passing through a tray aperture. The apparatus has a tray that is supported on first and second vertical loops at positions that are spaced apart in two perpendicular horizontal directions. Water is added to the trays on a downward leg of the vertical loop to drive travel of the vertical loop or augment a drive mechanism.