I took a bunch of photos of my dad’s rhododendrons up at the cottage he has in Glenisla. It’s at 900 feet and can get frosts from November through May, so they have to be quite hardy. He has around 300 planted now, mostly in woodland, and over 200 different species and hybrids. I’ve lost the list of the names, but once I get them I will update.
For the moment, you can see them (unnamed) here