Why are deciduous trees better than evergreens?
Deciduous trees planted outside southeast, southwest and western exposures provide shade during the warm summer months, then drop their leaves, letting light and heat in through the windows in winter. In some situations, evergreens will work well, particularly in windy locations, as they tend to be more resilient. However, heating in winter is more of a concern in B.C. than cooling in summer, so ensure you don’t plant evergreens where they will block winter sunlight from warming south and west windows.