"Pam Moore" wrote
Over the years I have planted bits of plants I liked the look of, but
have regretted ever since because they spred and are the devil to get
rid of. My invaders are corydalis lutea, vinca minor, meconopsis
cambrica and a lamium. This latter came about 20 years ago as a 9
inch piece stolen from a big garden!

What plants have others regretted introducing into their gardens?

A large leaved variegated Ivy, took over all along a fence and had to be
constantly hacked back. It's gone now.
Also Lysimachia nummularia (creeping jenny) which I planted years ago and
still find coming up here and there.

--
Regards
Bob Hobden