Heat tolerance of B. sanguinea, vulcanicola and their hybrids
I'm running into a similar problem with Brugmansia sanguinea, vulcanicola and their hybrid as one I've run into with Andean Passifloras. I sometimes give away cuttings or rooted cuttings and people from the Deep South are interested in trying them. Sometimes I'll say no, sometimes tell them it's unlikely to survive, or sometimes just suggest they trade them with someone outside the area or who has a cool greenhouse.
I was told that our climate is borderline for the cold growing Brugmansias. Our summer average is 80/55 (Sunset zone 15 for those who know the Western zones). Has anyone ever heard of success keeping B. sanguinea, vulcanicola or their hybrids outside all year in the Deep South? Or for that matter, anywhere more than 50 miles from the Pacific Ocean?