As few as three trees around your home can cut your air conditioning bills in half. Trees will also increase the value of your home. The east, west and south walls of your house receive the most sun.
Trees can also save energy in cold weather.
Plant a tree to shade the area around and over your air conditioner, but be sure to keep the air intake area clear of branches. You'll save money if your air conditioner draws air from a cool, shaded area. More home energy is lost from windows than walls, so locate your trees to specifically shade windows. You want trees near enough to shade, but not too close to overhang the roof. Don't plant large trees in restricted growing spaces.