Abstract: A system of irrigating a plurality of plants may include: a floor having an upper surface generally declining from an upper area location to a lower area location; an water delivery system for delivering an amount of water to the floor proximate the upper area location; and a drainage system for draining an excess portion of the amount of water from the floor. The system is operable to deliver water proximate the upper area location such that said amount water will flow toward the lower area location over the floor whereby a first portion of the amount of water flowing toward the lower area location will irrigate the plants. The system is also operable to drain an excess portion of the amount of water from the floor.