New York and a good chunk of the Northeast get a lot of produce from Canada year round. New York is also a major port city with fresh food coming in daily. I can't find any heirloom anything in my local market, not a big enough draw. The farmer's markets are great though fresh from field to table and usually great prices from great people. In the Bay area you actually have a really nice pipeline to farmers which probably explains the great produce. Portland seems like it might have a rain problem with would limit produce to tolerant it greenhouse crops, especially tomatoes which do poorly in tons of rain. Even lettuce needs to dry out lest it rot.