Unattended plant watering system

In combination, a plant container having soil therein for a live plant having roots growing in said soil and a water reservoir located above the level of said roots of said plant, and said water reservoir is comprised of a closed, hollow container having an exterior exposed to ambient air and an encapsulated interior cavity, and said container has upper and lower ends, and at least one drain opening is defined in said lower end of said container and said upper end of said container is closed and has an air adjustable valve through which said conduit passes, whereby said adjustable valve regulates air flow through said conduit to allow a controlled partial vacuum to be created within said upper end of said container to thereby limit flow of water to said roots of said plant out of said drain opening in said lower end of said container;

• wherein said conduit is comprised of flexible walled tubing defining a lumen therethrough and said valve is a pinch valve;
• a fill opening in said upper end of said water reservoir and a removable cap engageable fluid tight in said fill opening and said cap has a body defining a central guide socket and a surrounding, cylindrical, annular recess and said flexible walled tubing crosses said cylindrical annular recess, and said adjustable valve is comprised of a movable valve element including a dial, a centering post depending from said dial and said centering post. fits into said central guide socket in said cap body and is rotatable within said guide socket, and further comprising a valve closure cam lobe depending from said dial and radially displaced from said centering post, whereby said dial is rotatable to bring said valve closure cam lobe into contact with said flexible walled tubing with a pressure that varies with angular rotation of said dial relative to said cap body, whereby said cam lobe is rotatable with said dial to press said flexible walled conduit against said cap body to constrict said flexible walled tubing to a selectively adjustable degree;
• a flow dispensing cup located beneath said reservoir and having a transverse floor spaced beneath said lower end of said' reservoir and including a plurality of flow outlets in said floor of said flow dispensing cup and apparatus for distributing flow of water from said drain opening in said lower end of said reservoir to said flow outlets in said floor of said flow dispensing cup;
• wherein said apparatus for distributing flow of water is comprised of a tip bucket mounted directly beneath said drain opening in said lower end of said reservoir and above said transverse floor of said flow dispensing cup.