I have a few Zone 6 plants I am going to try an experiment with over the winter. My theory is that the north side of my house where I have my main perennial garden is Zone 5 and the south side, the backyard, is more of a Zone 6. One of my backyard gardens is up against the house and in pretty much full sun.
I have a potted fig tree in the ground that I was (and am) too lazy to move indoors to the basement for the winter. I pruned the little tree a few weeks ago and then wrapped it lightly in burlap (see next 2 photos).
The other part of my experiment involves agastache which I buy every year since it never comes back in my front perennial garden. I moved the 2 I had to the sunnier garden in the back. I know of gardens around my area that have Zone 6 perennials in full sun and they survive the winter. I cut one agastache back – you can see the green poking out of the leaves, the other I left uncut.
Hopefully all three will be back next spring! And I will let you know what happens….