I''m thinking that Smith, Kathleens Black and maybe Improved Celeste are not cold hardy enough for zone 6B unless grown in pots and protected in a garage for the winter. I don't know anything about Gino, VDB would need some decent protection or a good spot close to the house, south siide or maybe west. I believe Atreano is ok for hardiness, but have not tried it yet. Better choices for your zone might be Sal's Corlenone, White Marseilles, Latarollla (sp) There are others for sure, but I cant think of them at the moment or the names are not known to me.