I resisted buying a Buddleia (butterfly bush) for a long time, fretting about them being invasive. But this one was too gorgeous to resist. In my urban area, I don't think it is too bad a transgression. And look, before I even got it into the ground it was visited by a monarch and this black swallowtail. I'll make sure to finally get my butterfly weed (Asclepias) seeds planted in time next year so I'll have larval plants as well as nectar plants.