I have a Clivia that is several years old that has at least 3 offshoots. Should I leave them alone or should I pot them on in single pots? Replanting the 'mum' in the old compost in the same pot or should 'mum' have a bigger pot or smaller? I originally bought it as it was in the half price section and looked poorly. It is great to see how that has 'paid' off!
Typically, clivia plants resent being disturbed. However, repotting is normally done every 3-5 years with these plants, so it may be time for you to repot yours. Unless it's overgrown the current pot it is in, your mum should be replanted in the same pot. If it has become too large for the pot, then go up one more pot size.