Square vertical hanging garden rail that holds up to 8 plants. Can be hung indoor or outdoors on screws. Made from mild steel bent into a square shape and treated for outdoor use. Can be used in conjunction with 8 x 500ml or 300ml Rapid Grow Pots. Made to hang off walls and fences off of screws . Perfect for most flowers, vegetables, herbs and decorative plants . Rapid grow pots can hold plants 40-70% bigger per volume then conventional pots allowing for a wide range of plant options. For indoor use black moisture retaining cups are recomended to lower maintenance and eliminate mess