There are a few of these bright pink Geraniums. Geranium endressii is similar and I had one called 'Wargrave Pink' that was a ringer for this. (It seeded everywhere as well) It is finished growing now, so you can cut it back as you wish.

Jan - you may remember that I've talked about pink geraniums that spread. You can dig out a clump and chop off part of it, then replant the rest, otherwise, they will spread and spread some more. It's worth tackling, believe me!

Thanks to both of you. I know I said I wanted some ground cover but I take it this will take my small garden over if I'm not careful!

Yes, definitely. I've been digging a lot of mine out this summer - and replanting with non-spreading ones - well, not as invasive, anyway! :-))