The energy-conserving landscape strategies you use should depend on which region you live in.
Maximize warming effects of the sun in the winter.
Maximize shade during
Deflect winter winds away from buildings.
Funnel summer breezes toward the home.
Provide shade to cool
roofs, walls, and windows.
Allow summer winds to access naturally cooled homes.
Block or deflect winds away from air-conditioned homes.
Channel summer breezes toward the home.
Maximize summer shade with trees that still allow penetration of low-angle winter sun.
Avoid locating planting beds close to the home if they require frequent
Use dense windbreaks to protect the home from cold winter winds.
Allow the winter sun to reach south-facing windows.
shade south and west
windows and walls from the direct summer sun, if summer overheating
is a problem.
It's also important to consider your home's microclimate
in your landscaping strategy.