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. Vines provide shading and cooling, and are quick to grow. 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 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. The tighter the curtain is to the wall, the better it will reduce heat gain.