Melospiza
Shohin
For succulents that are not in bonsai pots yet, I strongly recommend keeping them in terracotta (clay) pots. It helps them stay dry and it's very hard to overwater them. I keep my P. afras in a southern window (also in 5B Illinois) in clay pots, and they often grow all through winter. If this one does not make it, you're welcome to take a cutting from me.