A sun tracking plant growing system includes a body having a first face, a second face opposed to the first face and a peripheral connecting edge which is relatively small, as compared to the size of the first face and the second face. A mounting enables the body to pivot about a pivot axis. Plant supports, which receive plants, are supported by the body. A sun tracking mechanism is provided which senses or calculates the position of the sun and adjusts the orientation of the body about the pivot axis to maintain a selected portion of the peripheral connecting edge of the body facing the sun so as to provide desirable and naturally attenuated sunlight exposure according to plants' needs on both faces throughout a day. This system allows that multiple rows or single row of the plural bodies are arrayed closely together without creating shadows to each other.