Sempervivum wreaths and topiaries can remain outside all winter, even in zone 3 or 4 temperatures. They may need a little sprucing up in the spring, but they'll recover quickly.
Baltimore County, MD (Zone 7a) A bit of this and a bit of that
Oh, that wreath is a lovely idea! How nice to have something that can be displayed year-round, rather than the typical evergreen boughs that fade after the holidays
I planted this ball about 5 years ago and throw it into the flower bed for the winter. I usually have to replace the ones that are face down in the flower bed over the winter. In early spring I hang it from my arbor.
2008
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2012
Yes, the original was a container potting mix, which was too long ago to remember what it was Chances are it was a potting mix small bale from Costco. It was peat based