Integrated horticultural grow rack kit

A horticultural plant growing assembly includes a pair of casings, each with a bottom and a side wall. Each side wall includes an upper edge configured to engage one another to define a cavity between the casings. The plant growing assembly further includes a light system, and a plurality of frame members that are connectable together to form a frame, with the light system being attachable to the frame. The plant growing assembly is configurable into a packaged configuration and an assembled configuration. In the packaged configuration, the frame members and the light system are contained within the cavity, and in the assembled configuration the frame members are connected together to form the frame with the light system attached to the frame. One of the casings includes a shelf adapted to support a plant with the light system disposed above the shelf.