permaculture at 55th latitude

Hi everybody
I´m here for the first time..I´m living in europe, owning a 4 acre sized little perma-farm..its located at 55th latitude and I guess I have nealy every possible and useful plant here, which can stick the climate ..wonder if there are plants, trees , vegs ..people grow on your side of the atlantic ocean in a similar situation, the like of canada or the south of alaska ,which I could cultivate here as well. I´m also looking contact to other "northern permies" just to swap information, seeds an stuff..