A device for efficiently irrigating a number of housing assemblies containing soil and plants. The housing assemblies are vertically mounted on a support structure. An irrigation system provides a flow of water to each of the housing assemblies. Each housing assembly includes an interior shell nested within an exterior shell. The irrigation system delivers the flow of water to two different heights of soil within the interior shell. A user may adjust how water is distributed within each housing assembly by manipulating one of several valves controlling the delivery of water from a main artery to each housing assembly. Water may be selectively and adjustably delivered to a plant containing a shallow root system, or to a different variety plant containing an extended or deep root system as needed. Excess water may be drained from the interior shell and held within a cavity for reabsorption by the soil contained therein.
