Sempervivums, again

Hi. I see Sempervivums apparently flower once (Monocarpic), before the rosette dies, withers, and is succeeded by its ofshoots. Mine have al produced the offshoots, some of which have been successfuly transplanted. However, the original rosettes have not died and, save for a few slightly darkening and hardening leaves, do not seem to be fading away, leaving a gap in theclump, as many descriptions say they should. Is it too early for the rosette to die, as they were only sown this spring?

Come to think of it, though, we used to have semps in a couple of old rocks outside the house; they grew for more than 20 years, and I never noticed any rosettes dying.

 

The rosette only dies after it flowers, some varieties flower more regularly than others.

Some appear to almost never flower, but I think they all do,.... eventually.