Washington's success with vinifera grapes
is due in large measure to the state's unique geography. The
vineyards are planted on the east side of the Cascade Mountains
which serve to protect the region from marine weather off
the Pacific coast and limit rainfall to just 6-8 inches annually.
Low rainfall and free-draining soils allow vineyard mangers
to control vine vigor in order to promote flavor development
in the grapes. Warm daytime temperatures ripen fruit to perfection.
Cool autumn nights protect grapes' natural acidity.
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