It's very simple actually, but you will have to be patient. That large rosette appears to be blooming... if so then it will shrivel up and die after the bloom is finished. The small ones should grow this year and have offsets next year in Spring or Summer. Possibly even this year. Those offsets will appear as miniature rosettes on little stolons (stems) growing out from the mother plant. They are often called "chicks".
Here's an example with obvious stolons, they are often quite shorter and hard to see.
All of those little chicks are busy growing their own roots which I think you can see in the picture. Those roots will grow downward seeking soil. Once they are rooted solidly in the soil the stolons will dissolve away and each chick can be pulled and transplanted. Even the young chicks in this picture could be cut off and planted separately right now, but it is so much better to let them root themselves because they will establish the correct soil level around them, which is important. If I were to transplant these now I would have carefully lay them out, water them, and babysit them. It's better to let mama hen do that, it works better but it's not strictly necessary. In another month I could separate those chicks and transplant them, but I'm going to leave them there and let them make a nice colony. They are generally most attractive that way, and I don't need to propagate them.
with all of the above.
). Several of us are trying it, it's this link:
