Abstract: A vessel for automatically sustaining vegetation includes a lower container for storing a reservoir of liquid, an upper container for supporting the vegetation and receiving liquid from the lower container, and a flow regulator for controlling the flow of liquid to the vegetation. The upper container is engageable with the lower container and includes a stem, defining at least one passageway, for extending into the liquid. The flow regulator includes a member which defines a flow port and which is rotatably attached to the stem of the upper container. In one embodiment the flow regulator may be controlled from outside the vessel by means of a control arm extending from the member.