Trees On Green Roofs

Grey leaved trees do well on a roof.

Trees on green roofs. The greater the roof exposure and overall site hostility the more important tree selection becomes. Plants for extensive green roofs should have low growth height rapid growth spreading and fibrous roots that have high drought tolerance. Because they are constantly pruned into shape they stay relatively small. Two of the most important areas to have a plan for are drainage and tree stabilization.

As the green roof industry has matured green roof designs are changing from rather simple extensive green roof systems to very complex urban landscapes on structure. With a total depth of 20 inches up to several feet they require two different types of media to provide the right mix of aeration and organic matter for the deeper root zone which this rooflite soil system provides. Trees are an. Luckily there is plenty of choice.

Topiary trees not to be confused with trained trees are often also a good option. Leading designers and landscape architects are envisioning and creating ever more sophisticated green roofs on top of buildings. When you include trees on a green roof as an integral part of a high tech building structure you need to consider many details and have a good strategy to ensure your trees thrive over the long term. Succulents such as sedum are often chosen for extensive green roofs because they withstand harsh conditions and minimize water loss.

Green roofs are a worldwide megatrend in architecture.