I'm under the impression that all that is required to propagate a sempervivum from its pups is to remove the pup and stick it in the dirt, with water. It can't really be that simple, can it? I've got several large clumps I want to break up and distribute through a xeriscape, but I don't want to do something wrong and end up killing them all. In a related question, will sempervivum come reliably from seed? For example, if I were to plant mature flowerheads? Thanks for your help!
Your information is correct, it is that easy. Success in a really dry locale is improved by planting pups that already have a few roots growing, but any of them should survive with a little supplementry water.
You've just described my soil's basic condition in the area I'm xeriscaping. The sempervivums I have are tremendously happy, but they're overcrowding, so I was going to use them as a bit of groundcover before the creeping opuntias.