I'm in search of tree seeds - fruits, nuts, fodder, N fixers, etc. Do you have favorite seed/nut sources or cultivars? I'm looking for production and vigor. Disease resistance will reveal itself over time (I buy into Mark Shepard's approach to selection). My zone is 7b, but I expect it will feel more like zone 9 by 2050, and hope for species that can live in zones 5-9. Yay weather volatility!