Cool Your Home Naturally with Creative Landscaping

Landscaping is a natural and beautiful way to shade your home and block the sun. A well-placed tree, bush, or vine can deliver effective shade and add to the aesthetic value of your property. When designing your landscaping, use plants native to your area that survive with minimal care. Trees that lose their leaves in the fall (i.e., deciduous) help cut cooling energy costs the most. when selectively placed around a house, they provide excellent protection from the summer sun and permit winter sunlight to reach and warm your house. The height, growth rate, branch spread, and shape are all factors to consider in choosing a tree. Vines are a quick way to provide shading and cooling. Grown on trellises, vines can shade windows or the whole side of a house. Ask your local nursery which vine is best suited to your climate and needs.

Besides providing shade, trees and vines create a cool microclimate that dramatically reduces the temperature (by as much as 9 degrees Fahrenheit or 5 degrees Celsius) in the surrounding area. During photosynthesis, large amounts of water vapor escape through the leaves, cooling the passing air. and the generally dark and coarse leaves absorb solar radiation. You might also consider low ground cover such as grass, small plants, and bushes. A grass-covered lawn is usually 10 degrees Fahrenheit (6 degrees Celsius) cooler than bare ground in the summer. If you are in an arid or semiarid climate, consider native ground covers that require little water.

Planning Your Planting

Placement of vegetation is important when landscaping your home. The following are suggestions to help you gain the most from vegetation.

• Plant trees on the northeast-southeast and the northwest-southwest sides of your house. Unless you live in a climate where it is hot year-round, do not plant trees directly to the south. Even the bare branches of mature deciduous trees can significantly reduce the amount of sun reaching your house in the winter.
  
  
• Plant trees and shrubs so they can direct breezes. Do not place a dense line of evergreen trees where they will block the flow of cool air around or through them.
  
  
• Set trellises away from your house to allow air to circulate and keep the vines from attaching to your house's facade and damaging its exterior. Placing vegetation too close to your house can trap heat and make the air around your house even warmer.
  
  
• Do not plant trees or large bushes where their roots can damage septic tanks, sewer lines, underground wires, or your house's foundation.
  
  
• Make sure the plants you choose can withstand local weather extremes.
  

Source:
U.S. Department of Energy