The present invention relates to a plant growth apparatus which is formed to grow vegetables by being placed at a predetermined space of a building structure including a balcony of an apartment. More specifically, the plant growth apparatus comprises: a lower waterspout configured by horizontally attaching a waterspout support on three to four struts having predetermined heights and fixing the same by using fastening bolts； a pan head formed at a predetermined height from the center portion of the lower waterspout； a central water supply pipe which is vertically installed by penetrating the center of the lower waterspout and the pan head, has a water supply path formed in the center portion thereof, and has a nozzle mounted at an upper end thereof； a rotary growth apparatus which is stacked on the upper surface of the pan head to be horizontally installed； a rotary growth apparatus cover which is stacked and coupled to the upper portion of a culture medium accommodation container； a small motor installed on the outer circumference of the upper surface of the pan head； and an intermittent drive unit which intermittently rotates the rotary growth apparatus by a predetermined angle when a driving gear attached to a rotary shaft of the small motor is in contact with an inside diameter gear. In the rotary growth apparatus, a rotary shaft pipe is formed at the center portion thereof so that the central water supply pipe can be inserted into the center hole； a flooding prevention wall is formed on the outer circumferential surface thereof； the inside diameter gear having a toothed gear formed on the inner surface thereof is formed by attaching a circular frame body using the center hole of the rotary shaft pipe as the central axis to the bottom surface thereof； and the culture medium accommodation container is formed on the upper surface thereof to configure a culture medium accommodation unit in a polygonal shape. In the rotary growth apparatus cover, a polygonal coupling
