Abstract: A stackable unit for automatically dispensing fluid to at least one growing medium container associated with the stackable unit. The stackable unit comprising at least one growing medium container and a reservoir with an open top to facilitate filling thereof. A drainage channel cooperates with the reservoir and the drainage channel having an inlet located adjacent the open top of the reservoir to facilitate draining of excess fluid from the reservoir. The reservoir having at least one lateral dispensing opening for dispensing fluid from the reservoir into growing medium. A capillary member, which controls flow of fluid from the reservoir to the at least one growing medium container, communicates with the least one lateral dispensing opening supporting, for supplying moisture to growing medium to facilitate growing of a plant.