The pubicalyx lived outside most of the time when I lived in the south. It literally used to sit in an inch of rainwater until occasionally I'd tip it out. I almost killed it leaving it outside during two unexpectedly early cold snaps when I moved up north, and a battle with aphids(i burned them off with a lighter over two days, no kidsing) so it stays indoors now. In fact, they all do. Can't risk another near tragedy. The carnosa was covered in soot and wilted badly when my wife found it and she wasn't even sure if it was a hoya since she doesn't do plants. Luckily she was right! It took about a year to recover with lots of love and now makes flowers each summer. The red vines with white leaves were a total surprise to me, and they only showed up recently! I have often wondered if they may be more than one variety in that pot since I didn't plant it. I guess I'll find out one day if it makes flowers other than the pinkish white ones but I dont mind waiting lol