What is a greenwall?
Greenwalls are soil-less vertical gardens grown on the surface of built structures. They are designed to mimic the growing conditions found where greenwalls occur in nature. Plants on a greenwall or greenroof live without soil using many adapted strategies to survive, poor nutrition, exposed conditions and seasonal drought. They colonise only those rocks and trees that provide adequate growing conditions: aspect, light, air movement, water and nutrients.
The most immediate benefit of a greenwall is its incredible beauty. The greenery is literally a living skin, allowing unlimited design opportunities. Many greenwalls are high in plant biodiversity, in Australia there are over 5,000 suitable native species that colonise rocks and trees.
The benefit for greenwalls is that in having no soil the greenwall can be used on a building façade or wall, where the use of soil is not possible.