English Walnut Cultivars
Are there English Walnut Cultivars that could be profitably produced in the Northern Willamette Valley? If there are, which cultivar? What are the negative aspects of producing this cultivar in the Northern Willamette Valley?
Clackamas County Oregon walnut trees
Yes there are. In fact the Willamette Valley once had a significant walnut industry. Contributing to its near demise and substantial shrinkage was the Columbus Day Storm of Oct 12 1962 (http://photos.salemhistory.net/cdm/ref/collection/max/id/876), which uprooted trees around the Valley. Untimely freezes and pest pressure are other reasons why California ultimately became the dominant player for walnut production.
Please see this OSU publication for variety information:
For an interesting historical perspective see this publication from 1910 about growing walnuts in the Willamette Valley: