Australia, with our hot, dry summers, is a particularly challenging place to grow plants in such exposed positions and there are a number of factors to consider. Check to see how much sun the wall or fence receives throughout the various seasons. In some cases, walls will bake in the summer sun and then be in total shade through winter. There are very few plants that can cope with such extremes. A surface that is in full sun all year will get very hot and will require constant maintenance. Gentle, filtered shade or morning sun/ afternoon shade are probably the best aspects to choose to enable the widest plant choice.
The easiest way to create your green wall is to buy one of the numerous kits that have been expressly produced for this purpose but you can also set up your own system. The choice of containers is endless – only limited by your imagination. Anything that will hold mix for the plant to grow in can be used.
The growing medium is important, especially if you want your display to last for a long time. It must be capable of holding nutrients and moisture, but must not be too heavy. Don’t use garden soil as it will set like cement between waterings. Good quality potting mix can be mixed 50:50 with lightweight perlite, vermiculite or small styrofoam balls.