I think it's seasonal - as you say, the ones that are starting to do it seem to be the fuzzy or cobweb types and I've observed that they all start chicking first too. Just a genetic trait, I think. This will be interesting. One of the rosettes I just got in my trade from Nova Scotia was coning, big time even in transit. It's supposed to be Aymon Correvon, but it's totally different from what I have under that name. This is going to be a pain if they're all mislabeled. That's two now.
Last year I saved all the seed I could from Sempervivum, and Jovibarba that flowered, and they are growing like gangbusters - well, not like gangbusters as they're so tiny, but I sure got lots.
