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Tree Space Design

The ability of trees to grow and thrive is directly related to the amount of soil available for tree roots. As a result, trees in typical urban “tree boxes” tend to be short-lived since their needs can quickly exceed the capacity of the space.

Casey Trees convened a panel of experts to develop design recommendations that would provide street trees with adequate soil volume while maintaining sufficient space for pedestrian circulation. The resulting report includes a matrix of soil volume recommendations and root-friendly design methods, intended for inclusion in design standards and use in individual projects. The recommendations will not only yield larger, healthier trees, but will also minimize damage to paved surfaces, creating a better streetscape environment.

Tree Space Design Report wins Merit Award in Communications from Potomac and Maryland ASLA. press release

Tree Space Design Report Links
High Resolution PDF of document
Low Resolution PDF of document

Report Images
Tree size and soil volume
Open tree space example
Covered tree space example
Partially covered tree space example
Root paths example

sidewalk silva tree-space-design