Sempervivum tectorum, commonly known as "house leeks" or "hens and chicks", just keep spreading in our back yard. Right now, they are flowering. Sempervivum means "always living". They're called joubarbes in French, or Barbe de Jupiter. Some people refer to them as petits artichauts.
I have them planted in pots, planter boxes, and concrete blocks all around. Some are growing directly in the sand and gravel that surrounds the house as a kind of patio.
Sempervivum plants are the kind of plants I like. They are hardy. Drought doesn't bother them. Freezing weather doesn't hurt them either. They seem to love heat and full sun. They survive and spread gradually without being invasive.
This species is native to southern Europe and North Africa, apparently. They obviously also thrive in the Loire Valley climate. They grow on rooftops and were thought in ancient times to protect houses from lightning strikes.
The first ones I had were given to me by a woman who lives on the other side of the village. G. is nearly 90 years old now, and she doesn't get out and about as much as she used to. I thank her for these plants, which I've been growing for a dozen or so years now.