A green wall planting support apparatus includes at least one hanging plate, a plurality of containers and a water supply system. The hanging plate includes a channel portion that is elongated in a lengthwise direction of the hanging plate and that has a first channel, and a hanging portion that is made in one piece with the channel portion and that is disposed in the lengthwise direction. The containers are detachably connected to the hanging plate for receiving plant and each includes a hanger portion that is detachably connected to the hanging portion. The water supply system includes at least one water dispensing unit that is mounted on the channel portion for conveying water to the container.