A wall mounted agricultural system includes a mounting structure including first and a second ends and supported from a substantially vertically extending wall surface, and at least one planter box that includes a plurality of sidewalls and a bottom wall that cooperate to form a compartment and an upwardly opening aperture, wherein at least one of the sidewalls comprises a rear wall facing the wall surface, the at least one planter box is configured to mount to the mounting structure such that the rear wall is spaced from the wall surface to create a space therebetween, and wherein the at least one planter box includes an aperture in fluid communication with the compartment and the space positioned between the rear wall and the wall surface, and wherein the aperture in fluid communication with the space is configured to allow water received through the upwardly opening aperture to drain into the space.