A modular interlocking planter apparatus provides modular assembly of a planter structure having a plurality of wall panels, a plurality of connectors, a plurality of internally spanning support bar assemblies, and a drain. The wall panels are planar waterproof members arranged vertically and connected by the connectors to secure adjacent wall panels together to form various shaped enclosures for above ground planting and growing. Each opposing pair of connectors includes a pair of horizontal spanning support bar assemblies to provide structural stability. One (1) of the wall panels includes the drain vent connected to a length of perforated drain tile which extends throughout the assembled planter to receive and drain water from soil placed in the planter.
