I have the white one too, but I don't think I will ever get a bloom from it. Even having a g'house. Mine is probably about 10 feet tall.
Gordon, I bought this as a $5.00 "last chance" plant at an "end of season" sale. I figured for $5 bucks, it could either live or die. It has done well.
I've had it at least 5 years. It was probably a couple feet tall and looked like it had been through a war.