Green walls/living walls, have quite a high profile in the Urban Infrastructure scene, and a good thing that is, for they are very beautiful. When people talk about green walls in cities, they are usually referring to high rise or medium density dwellings that have had their facades planted with a lush array of vegetation. Usually this is achieved by building a wall substrate that can hold light weight growing media. Irrigation is key in these systems in most situations. There are some fantastic examples of green walls in various cities. Apart from their beauty, natural vegetation growing along the facade of a tall building tends to inspire a little awe: for example Patrick Blanc’s green wall at the Athaneum Hotel in Picadilly, London. But green walls can be very expensive to build and expensive to maintain. And in places like Australia with irregular rain fall and very dry summers, the plants will be 100% dependent on the irrigation system working 100% of the time. So here are some ‘green walls’ or Green Infrastructure projects of the old fashioned kind; cheap to establish, accessible to all and cheap to maintain: starting with plants that are used to create ‘green fences/walls’.