On Sun, 24 May 2009 14:04:00 +0100, "Tim"
wrote:

I regularly cut mine back during the summer when it gets beyond bounds with
no problems - like you, though, mine has made a poor show this year. In
fact I've just put a post up!


Yes, I've just seen it. Sorry to hear yours is out of sorts. I've
not seen mine wilting at all but I've got precisely 2 flowers - that's
it.

I've gone ahead and trimmed anyway just as an experiment. I suppose
some knowledge of biology and the life-cycles of plants would be
useful but I lack that.