Trees On Green Roofs

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 on green roofs.

Leading designers and landscape architects are envisioning and creating ever more sophisticated green roofs on top of buildings. Trees are dominant elements in any landscape and on a green roof trees will generally be stunted in height and spread when compared to those planted at ground level. Because they are constantly pruned into shape they stay relatively small. 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.

The greater the roof exposure and overall site hostility the more important tree selection becomes. Rooftop trees rooftop trees are a special category of deep intensive systems. Succulents such as sedum are often chosen for extensive green roofs because they withstand harsh conditions and minimize water loss. Luckily there is plenty of choice.

Two of the most important areas to have a plan for are drainage and tree stabilization. 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. Topiary trees not to be confused with trained trees are often also a good option. Grey leaved trees do well on a roof.

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