I like to grow ornamentals amongst the edibles and last year put in Rudbeckia triloba 'Prairie Glow' and fell in love with the mass of bright little orange and yellow flowers with dark centres. Left them to seed and quite a few have popped up around where they grew, but not in good growing places, so I've potted them on and am hoping for another glorious display.

As someone else said here, I'm also a fairly lazy gardener and if something self sows then it's generally left to get on with it. I leave Verbascum thapsus for the mullein moth caterpillars, who rely on it, but it usually still flowers. Flat leaf parsley has taken to growing here and there which is welcome, as has red leaf orache which makes a pleasant addition to the pot. Thyme and white flowered oregano grow where they feel like it and have moved from one spot to another around the garden many times, though they seem to have now found favoured spots. Same with chives. Potatoes too, they volunteer all over the place. I mainly keep the weeds down but it's always interesting to see what comes up and where.