I have trees that I don’t know where I want to plant/no room for. They are potted. I can’t think of the best way to keep them over winter. None of my choices sound ideal. The outside could get -10f and freeze them.
My Outbuildings (lawn mower sheds) will get just as cold? My garage is very often heated as I have a woodshop in there.
The basement will stay near 60 in the winter.
I do collect leaves that are crushed by a Trac vac and the pile is large enough to completely bury them.
( I could bury a car) .