Storage of potted plants during the winter
I bought a new house and will be moving in February. The beds at my current house are overflowing with perennials. I want to take some with me when I move. Since it is still warm, I have dug some up and put them in pots (I am in Westchester county New York). So far I have potted hydrandea (2 different kinds) and Peony. My hostas are too big to pot (they are 30 years old), so I want to split them and wrap them in burlap.
Question: Where should I put these after they are out of the ground until spring. Should I leave them outside (i think they will freeze), or should I put them in my garden shed or my unheated garage, or bury the pots in mulch?
Also, do the Hostas need to be in dirt, or since they are roots, can I take the roots with me and plant them at my new home in the spring- how should I store them until spring?.
I hope I didn't ask too many questions in one post?