Harry Lauder's Walking Stick
I live in New York in zone 5 and purchased a 4 ft. tall corylus avellana 'contorta' or Harry Lauder's walking stick at a gardening show. I planted it in a large plastic container that looks like a half wine barrel. It's currently outside with 2 inches of mulch on top, inside container. Can it remain in the container outside indefinitely, especially through winter?