Hi Iain, I have three large clumps in Kent UK and they are all flowering prodigiously. I too am worried that that is the end of them and as they form a significant statement in my garden should be horrified to lose them . That said there are a number of new leaves appearing which | hope is a sign of intention to live. A brief trawl of the Internet indicates that this and last year saw a world wide flowering, with various comments about regrowth after being cut back and even fresh growth when dug up and discarded, so let us both hope all will be well next year. I have to say apart from curiosity close up, the overall appearance of a clump is drear. Bestest Paul