The west and northwest sides of the house should also be blocked at low angles to block late afternoon sun. Plant fuller trees with lower branches in these areas to save energy. Until the trees properly mature, consider vines on or near the house. They can help keep the summer sun from baking walls and heating the house. Deciduous vines will get out of the sun’s way in winter, but windy areas might call for evergreen vines to block chilly winter blasts.
A landscaper might also be able to help design a channel of plants that will funnel cooling summer breezes into the house to help you save energy.
Finally, at the most basic level, any landscaping helps cool the air in the immediate vicinity and will reduce the amount of surface and ground heat seeping into the home. Soil covered with plants and shaded by trees will remain cooler than asphalt and other heat-absorbing surfaces.
Saving on Heating Bills
The key in winter is blocking cold wind while allowing the sun to provide passive solar energy. Harnessing passive solar energy helps you to save fossil fuel energy. The latter is simple. Just get the trees out of the way of south-facing windows (possibly by using deciduous trees, as mentioned above).
Rows of dense, low evergreen trees and shrubs can help block wind. Ideal shrubs will grow to between 6 and 10 feet, such as camellia, hollies, oleander, and Viburnum.
Heating and cooling bills can be significantly reduced with well-designed landscaping, including trees that cool the air and block summer sun, and shrubs that control winter wind.