Landscaping tips to shade your home
Trees
The U.S. Department of Energy estimates that just three trees, properly placed around the house, can save an average household between $100 and $250 in energy costs annually. To be most effective, trees should be strategically located on the south and west sides of your home. Deciduous trees are best, because they shade in summer and allow light and radiant heat to pass through in the winter. When choosing deciduous trees, ask your local nursery to recommend varieties which are native to your environment, fast growing and tall enough to be effective.
Arbors along the sides of the house, attached or detached, will similarly reduce temperatures as the air movement can pass through the arbor and be cooled by evaporation at the plant's leaves. The shade created by the arbor is also beneficial. The arbor is a traditional cooling method used worldwide
Vines
Vines provide shading and cooling, and are quick to grow. Trellises should be placed on the hottest side of the house, and blocked out at least 6" from the wall to protect the wall and provide a buffer of cool air. Certain vines, such as deciduous clematis and wisteria, grow well in containers where open ground is unavailable. Ask your local nursery which vines are best suited to your climate and needs.
Shrubs
Shrubs protect the lower portions of walls from heat gain by blocking sunlight. They also act as a windbreak in winter to help protect the house from cold air. Choose shrubs which are low maintenance and grow to a fixed height. Local varieties will do best.
Take care to locate trees or large bushes where their roots will be clear of underground wires, sewer lines or septic tanks, or the house foundation.