By Littlelegs
Kent,
United Kingdom 
I'd please. Friends garden.
12 Jun, 2014
Answers
Thanks, is it invasive , and is it a weed?
12 Jun, 2014
It does seed prolifically but I wouldn't call it a weed I grow it in my garden and love it :-), it's easy to pull out any unwanted seedlings, most are either annual or biennial so die after flowering.
12 Jun, 2014
Thanks for the info simbad.
13 Jun, 2014
It's an Evening Primrose or to give it it's proper name Oenothera :-)
12 Jun, 2014