By Amsterdam
Shropshire,
United Kingdom 
Crocosmia. Whilst enjoying a lovely holiday in West Ireland, I was astounded to find that along all the grass verges, crocosmia had self seeded everywhere! And I mean everywhere!!! I noticed some people were growing it in their garden and can see how easily it has self seeded. I am now determined to dig mine out as it has spread throughout my garden.
3 Aug, 2014
Answers
Grows all over the Orkney Islands too…
3 Aug, 2014
and the shores of loch sween. Just had a week there what a lovely place.
3 Aug, 2014
More or less a hedgerow plant - Cornwall's got tons of it, and parts of Devon. I'm assuming you mean the old fashioned, original Crocosmia masonorum with the orange flowers.
3 Aug, 2014