Hi. Last year when I started collecting Sempervivums, I got caught up in Heufelii and ended up with more of them than regular Sempervivums. I had a few that weren't as hardy, then some that are limping back gradually, but these three I give my prize for looking good, and having extreme cold and drought survival abilities. I judged them on the way they look (fresh, clean) the fact that they did not go dry, or lose leaves, or were not damaged by the weather. I have a few more, like "purple haze" which looks genuinely beaten up, so it may come back later, but for now, it is looking bad.
Blaze
Bora
Irene