On 10/07/2011 11:32 AM, Sacha wrote:
Could you grow the Mexican Fleabane that David mentions? That's if you
haven't already got it and are fed up with it seeding itself
everywhere! It's Erigeron karvinskianus and we love it. It looks
marvellous dotting itself about in crevices and seems to flower for
ages, on and off, mostly on!

I saw his post, and I intend to try!