R. bhutan has been mentioned here a couple of times but there was not much information available about it then. Can anyone yet say how big it gets and what degree of hardiness to expect? Has there been any breeding done with it by anyone here? Does anyone by any chance have a photo of it?
I can tell you it is susceptible Powdery Mildew.
I’ve seen it. It has beautiful shiny dark chocolate green foliage.
It’s a pity it’s prone to disease.
I suppose you could cross it with baby love.
I had it several years ago when I live in PA zone 5 and it didn’t survive the winter for me. I’m not sure why there is not much information out there about this one.