I have a rhododendron in my yard but never thought of them as houseplants. I'll have to check them out.
Joann

Thanks for the info Tindo! Sounds like I would need supplemental lighting if I grew them indoors. It's just too dark in the Pacific Northwest in winter.

I bet some of them could be grown in sphagnum, since many are epiphytes.

Thank you. That's what I thought - mine doesn't get enough humidity...