A green wall is basically a vertical garden bed. Green walls are a relatively new trend, that is not only space efficient but equally productive as traditional ground based gardens.
Green walls or vertical gardens are a great alternative for gardening in small backyards, and is an ideal solution to the general increase in higher density living. Many new developments now see green walls specified by building designers and architects as the walls can become an integral part of the house design, not only offering produce but also providing shade, privacy and natural cooling to the dwelling.