Check out yellow leaves on rhododendrons and azaleas.
Compost is an acceptable amendment for blueberry plants, but it's important to test it before you apply it. Pay attention to pH and nutrient levels, and watch out for weeds.
A list of recommended trees and shrubs in Oregon, good for controlling erosion.
Certain varieties grow best in the Pacific Northwest
OSU Extension publications show how to grow several kinds of berries, fruit trees, roses and native plants in Central Oregon.