An aerating base plate designed for placement in the bottom of a conventional plant receptacle, such as a flowerpot. The plate has a sidewall that extends downwardly from the perimeter of a convex top. The top includes a number of perforations that function to enable water and air to flow into, or out of, an interior area of the plate. The plate's sidewall features a number of openings that also enable water and air to flow into, or out of, the plate's interior area. The sidewall's openings are sufficiently small so that they substantially prevent any flow of soil into the plate's interior area.