In honour of Earth Day, we look at a few of the magic tricks trees can perform in your garden.

MONEY WELL SPENT | In the landscape of memory, trees define the countryside. As the most prominent and long-lived of all vegetation (think giant sequoia), they are the one green symbol guaranteed to represent place. Mention Italy and Italian cypress come to mind. Images of southern France always include olive trees. The English landscape, that great affectation, is symbolized by large-scale deciduous varieties planted in “clumps” (by Capability Brown) that look from a distance like a single stylized tree. In the Pacific Northwest, iconic evergreens—Douglas fir, Western red cedar and hemlock—colour much of the landscape black-green, a situation that both pleases and perturbs me. Read more