OH my Oh my Oh MY......this thread is sooooo interesting .......and such great pictures.
Wolfgand you have such a nice collection of different ones that I have not seen before
Lynn ..way back on the first page you posted a pic of a sedum that someone sent you for a rosularia. (Seriously???) I am 99% sure that it is Sedum divergens minor. It's getting dark now but i will take some pics of it and of my Rosularia tomorrow. I sure hope i have the right names on them. So am I understanding correctly that they are no longer called Rosularia but Promethium? I think that mine may just stay Rosularia untill I run out of tags.
Lynn Its great to hear that you do not fertilize them and they come through the winter with flying colors. I have had trouble over the years with them. I have lost quite a few in the winter and I have been giving them the same fert. as the Semps. Perhaps they do not need it.
Another experiment coming up.