A buoyancy operated self-watering planter

摘要

A buoyancy operated self-watering planter comprises an inner receptacle 1 positioned within an outer receptacle 2, the void between the two receptacles creating a reservoir when filled with fluid. A valve 3 is located in a central depression or raised ring in the base of the outer receptacle. If the weight of the inner receptacle and contents is less than a certain value, the inner receptacle will float, opening the valve and allowing fluid ingress from the reservoir via an aperture in the base of the inner receptacle. When the weight of the inner receptacle and contents has increased beyond a certain value, the inner receptacle will sink closing the valve. A drain screw 4 may be positioned in the base of the outer receptacle, within the depression or raised ring, to allow excess water to drain from the inner receptacle.