Sempervivums - monocarpic?

Hello - this is my first post and, as a newcomer to this site, I sincerely hope I have posted it in the right place!

I see Sempervivums apparently flower once (Monocarpic), before the rosette dies, withers, and is succeeded by its offshoots. Mine have all 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 the clump, as many descriptions say they should. Is it too early for the rosette to die, as they were only sown last 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.

Z, first of all a warm

Yes, the sempervivum only flowers once - the thing is a flower is formed in the middle of the rosette while rosette seems to be "growing" a stalk. The rosette leaves actually become leaves on the stalk with flowers on the top of it! There is no rosette to be seen at this time, just a flower stalk.This might as well be the reason you have not seen a rosette dying after flowering.

Some semps flower as early as in second year, some take years and years to flower. There is no rule to it, but I've noticed in 2010 as we had a rather cold summer with lots of rain the number of flowering plants was only the half of that a year before.

Thanks for that.