A potted tree support assembly includes a housing with a bottom wall and a perimeter wall. A plurality of interlocking slats is positionable in the housing to define a plurality of compartments each configured for receiving a base of a tree therein. A plurality of slots extends into an inner surface of the perimeter wall. Each of the slots has an associated opposing slot extending into the perimeter wall to define an aligned pair of the slots. Each of the slats has a pair of opposed ends and the opposed ends of each of the slats is removably positionable in a selectable one of the aligned pair of the slots. A plurality of legs is coupled to and extends downwardly from a bottom surface of the bottom wall.