Brugmansia sanguinea and a species that is rated sometimes by mistake as a subspecies - these plants are usually rated under Brugmansia friends as very sensitive in culture and they are some idiosyncrasies rumored - for example concerning the formation of flowers. It is very often claimed by growers that the plants do not tolerate full sun and need a position in the shade. When I have a look at picture material taken by brug friends from the UK and the U.S. who cultivate their sanguineas, vulcanicolas and resulting hybrids of hybridisation (x rubella and vulsas) in full sun and add my own growing experiences then that is only partially true. In each case they need a little bit more attention in care. A shaded bale is prefered - especially when the plants are kept in containers and pots.