Just discovered we have the same problem, clearing a bed yesterday to find loads of 3-4 inch rosettes all through the bed. Couldn't figure out what they were (I'm no plant expert) we spend most of our time digging up creeping buttercup and marestail. We only had 1 plant in the bed which is 9mtx4mt and it seems to have spread over more then half in a year. Mind most plants have struggled in this area so maybe this will be a way of getting some happy plants
Mine aren't happy at all - on clay. I can't get them to stop sulking, let alone send out runners. I might give up the effort. Nice for autumn colour, though. I find mine need a huge amount of watering, four years in.
We have clay soil and ours are rampant! We moved into the house 13 years ago and I thought the plants were beautiful, so we let them do their own thing. From last year they have started appearing INSIDE our dining room.
Beware!
We live in an old house and the roots have invaded the mortar of the old stone wall at foundation level.
I have repeatedly dug them up only for them to appear again. They have invaded my lawn now.
They may be beautiful but they are really causing me a headache. I would not plant near the structure of your home.
I've posted before about how thuggish they are in my garden. I had left a patch that grew virtually under a fir tree. Since we have cut the fir tree down they have again become rampant. They are pretty but you need to stay on top of them. If you are fit and able and don't mind the work then that's fine but otherwise beware of them. Any bit you leave will regrow and it's a constant battle to keep them under control.
I commented on this thread earlier this year and confirm that we are being taken over by them. 3 large beds have begun to over run, it's light loamy soil very dry and sheltered. We started off with a couple in each bed (9mtx3mt) and now have too many to count
Having just spent 18 months, blood, sweat and tears, and £££ to clear bamboo from my garden, I was just about to plant some Honorine Jobert. Blimey, am I glad to have read this post first! Thanks, all.
I'm also rethinking whether I want to keep three clumps in my main flower border. The original pink September Charm is very pretty when in flower but a thug when it's not and a shoot has now appeared 3 ft down the other side of the retaining wall on the drive. The other two are white Honorine Jobert which have been well behaved until now but are now looking to expand into their neighbour, a big Stipa Gigantica. Anything that becomes a thug in this garden is going to have to go, to simplify future gardening for me now that I'm getting older.
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