A water-level indicator and re-fill apparatus for the sub-irrigation of potted plants. The indicator uses a float and shaft placed inside an outer tube attached to a potted plant as a way to visually indicate to the user when the reservoir of the sub-irrigation system is running low. While attached to the plant, the user may conveniently re-fill the apparatus after being notified of the water level without disassembling the apparatus or removing it from a decorative planter.
