I'll have to tell the hubby about this and look into it a bit, I know hazelnuts grow here just fine. He has become interested in mushrooms over the last few years and I'm sure would be keen on truffles too. We've been talking about putting a log under our Douglas fir trees and inserting mushroom dowels in it. Hubby is a bit more short term thinker than 4-5 years in the future, but I'd remember
This past year we had a new vendor at the farmer's market, she grows mushrooms and we have become quite the fan of Lions Mane.