Energy-efficient Landscaping

Energy-efficient landscaping is landscaping designed to conserve energy (reduce energy usage). 

Techniques include: 

Shading. 
Windbreaks. 
Wall sheltering, where shrubbery or vines are used to create a windbreak directly against a wall. 
Energy-efficient landscaping also may involve using drought-resistant plantings in arid areas, and similar techniques. 

Strictly speaking, landscaping also includes earth sheltering and placement of buildings so that they can use natural landforms, such as hills, as windbreaks.