Where did you come from?

Behind the garages/workshop there is a small raised bed rather choked by fennel, valerian, chives, marjoram etc. And my own shed/greenhouse is there too.
Today I was surprised to find these mallow flowers, growing in a pot which I think I bought at last year's fete, and left in the cold frame!
Oh dear, time for a bit of a sort out round the back there, I think!
More tennis watching today! Exhausting!