Garden Visiting? Seattle, Portland, Eugene

I'll be on vacation in Seattle this coming weekend and most of next week, then heading down to the Portland area and to Eugene. I'd love recommendations from readers in those areas for public gardens to tour, or specialty garden centers to visit (native plants, orchids, heirloom veggies, etc).

I'd really enjoy meeting some Northwest gardeners, too-- how about coffee or tea meetups? Drop me an email or a comment if you'd like to get together while I'm in town!