Schisandra is another thing I want to experiment with also. My wife and I take a liver support supplement and one of the key ingredients is schisandra.
We are in a zone 3 and some of the reading I have done seems to say that they
should be able to survive. The seed sources I have come across though say zone 4 or 5. Like other plants there is quite a variation in cold hardiness depending on if they were selected for that trait or not.
Update I did come across this source which is a zone 3.
https://onegreenworld.com/product/eastern-prince-2/
A little pricey, also I would prefer seeds if possible, although a lot of people seem to have trouble getting them to germinate.