Phygelus spreading like mad, the creeping potentilla has now invaded my next door neighbour's garden and has created a curtain down a retaining wall. I have another which I can't remember the name of, soft green leaves, very pale lilac flowers and a nice scent, but with very deep roots and new plants popping up all over the place. Dug over the whole bed last year, but still haven't got rid of it. I just pull them out now whenever I see them. Not in flower yet, but prett when it is.