A plant trellis system for growing plants on hard surfaces such as patios or decks is disclosed. The system comprises a trellis base having a plurality of cutouts, a pot having a plurality of legs protruding from the bottom surface, and a plurality of wire mesh panels supported on the trellis base. The plurality of legs is inserted into the plurality of cutouts forming a firm connection between the trellis base and the pot. The trellis base further comprises a groove on each side where a base wire of the plurality of wire mesh panels is inserted. The trellis base also comprises a plurality of notches on each side to receive the vertical wires coming from the base wire. Clips are used to attach each wire mesh panel to the adjacent wire mesh panel. The system is portable and stable beyond the boundaries of the pot to support larger plants.