In article , Rufus
writes

If anyone knows of an alternative, I'd be grateful to hear about it.

Someone on this group some time ago said that he had eradicated it
simply by constantly cutting it back as soon as it so much as showed a
bit of growth above ground. Took about 5 years if I remember correctly.
--
Jane Ransom in Lancaster.
I won't respond to private emails that are on topic for urg
but if you need to email me for any other reason,
put jandg dot demon dot co dot uk where you see deadspam.com