I picked up this semp today at Home Depot
It is Sempervivum arachnoideum 'Cebenese'
It says "Although very cold tolerant, best to provide frost protection to prevent possible scarring" It says hardy to 20F
Obviously I'm not going to put it out now. But should I leave this one in a container so I can easily bring it in for the winter? It will certainly get frost and snow here and be in some less than 20F temps!