hi Rodney,
most are in pots and I bring them inside to cold room, 34-40F degrees, for winter. They go dormant.
I have 2 outside, in ground, one close to house with southern exposure, another out in backyard dogleg valley, so it is naturally very protected from cold winter winds etc. I give extra protection to both outside trees for the winter. I am in zone 5b/6a border, so winters are cold and long.