Set this self-watering raised garden bed on the balcony, deck, or patio to grow beautiful, shallow-rooting plants. This elevated patio garden bed set is designed to collect water that isn't absorbed by plants as they are watered. The water is stored in the self-watering disk to allow plants to soak up later. The drainage holes on each side of the raised bed open to release the water when needed. These planter boxes can be assembled in many ways to fit any garden space and shape, making them perfect for small spaces.