The coastal regions of Oregon and Washington have different climate and soils than other parts of the states. Rainfall is high, ranging from 70 inches in southern Oregon to more than 100 inches in the coastal mountains. ...
This article describes how to determine vineyard nutrient needs through tissue and soil sampling.
While the type of soil is important, location takes precedence when starting a vineyard for wine production.
Information on vineyard water management, focusing on when to initiate irrigation.