I don’t, it’s got up to 41C this summer, and up to 46C few years ago. They’re mostly fine with a bit of extra shade on a really hot day. I’d also water about 3 times.
Try contacting Andy's. That's where I bought mine a few years ago. It has been fairly tolerant and a good grower. It flower twice a year but nit nearly the show that @krisk is getting.