Posted: 10/09/2014 at 17:44
Given the general weedy state that geum might be Geum urbanum, wood avens, which is a weed.
The pink one is a persicaria, knotweed. Flowering now it's probably the annual weedy one.
That could be an evening primrose with the stinging nettles at the top. Biennial, will flower next year, but it's very much in shadow so I'm not sure.
The tall one that's gone to seed, that's not a sow thistle, the leaves are wrong. Have you any idea what colour it was when it flowered and do the leaves smell at all?. I'd hold on that, till someone gives a positive ID