Volunteers that popped up late summer 2017, slow growth over winter, so leaves are small & plants are short — during summer they’ll get 5 ft tall even outside. We’ve also had plants overwinter outdoors. Tough guys! I need to learn more about how these plants affect bees that visit; nicotinoids are very toxic to them. (BTW, those are shallots in the background, not weeds, but plenty of cleanup is overdue!)