Reread the Sagas and the recent reports of teh scientific excavations. The Vikings did pasture cattle on Greenland. There were no vines growing there, and that was both Hugh and series to them.
All reports are congruent on the Viking love of mead, wine, etc.
Vinland, probably Newfoundland or perhaps part of New England, well may have had vines during that warm period.
Mead is made from honey.