I have had rather large clumps in the past that bloomed just fine. But the trouble lies in--eventually I need to divide it for space reasons or to give a piece away or move it or whatever reason. Well then I discovered I cannot physically handle those huge clumps, they are heavy and awkward! So I decided not to let any of mine get that humungous again. Everything pretty much out in the garden gets done by little ol' me and my back doesn't appreciate heavy lifting lol So about 10 or 12 fans is a nice clump for me and when it gets much bigger than that, I divide it to keep it at a manageable size.
