Your trees are an important part of your yard. They not only provide shade and comfort to your family and add value to your house, they provide an important cost-savings opportunity. “You can dramatically reduce your heating and cooling bills by planting trees and caring for them,” says Bayer Advanced™ Garden Expert Lance Walheim, a best-selling author and regular contributor to Sunset magazine.
Try this test: Take a walk through the woods on a hot day. Notice how much cooler it is? Leaves block sunlight. Take the same walk in the winter. It feels warmer because the trees, now without their leaves, allow sunlight through, while the trunks and limbs serve as a wind-breaker, thereby reducing windchill.
According to the Colorado State University Cooperative Extension, your winter heating bills could be reduced by as much as 25 percent and summer cooling bills by 50 percent if you place trees in the best locations around your home.
The east and west sides are most important to shade because of the path of the sun. Try to keep the south side of your home unshaded so winter sun can warm the house during the cooler months.