Abstract: A modular cultivation apparatus for the cultivation of plants and the simultaneous production of earthworms and fertilizer/top soil. The apparatus comprises an enclosure (12) including a modular foundation (14) comprising a plurality of plant growth modules (34) for the cultivation of plants and a plurality of harvest modules (36) for the growth and harvest of earthworms. The enclosure (12) further comprises side walls (16) mounted atop and supported by the modular foundation (14), such side walls (16) in turn supporting a roof member (26). In one embodiment, the apparatus further comprises an interior grow light (52), and a self-contained irrigation system (76) for dispersing liquid nutrient or other liquids to the harvest modules (36) and plant growth modules (34).