This bellflower (Campanula latifolia) has been coming up in our back garden for quite a few years. It’s on the edge of the central bed that we’ve been trying to rejuvenate and it seems to be doing well enough. I think we should encourage it because it’s a really lovely flower. As it is, we get four or five stems and I certainly wouldn’t mind a couple dozen. The Missouri Botanical Garden says it “spreads freely and agressively by both rhizomes and self-seeding under optimum growing conditions.” I’d say our growing conditions are not optimum, then, because it’s keeping itself to itself.