FWIW.............I had mine probably at least 6 or 7 years before it bloomed. Now it is in a 20 inch pot and very unmanageable. I am going to divide it because I think it is crowded beyond what it even likes to bloom. In order not to hijack this thread, perhaps I will start another and find out if you peeps that know more about them than I do think I should divide/repot.
A couple of years ago in January it had 12 blooms at once.