Shade, clay and cold
I recently moved to zone 7a (nashville) from the south where I had extensive groupings of azeleas. I have a hill facing north, stone and clay, 8 by 12 pitch (roofing terms), under almost full shade from very tall mature trees. I want to plant azeleas and rhododendrons, but as I research them there are problems. For example I like g.g.gerbing and Taber azeleas which I found are hardy, but they are not recommended for zones below 7b. I find the small leaf azeleas have very shallow roots and need constant watering, which would not be always feasible. Likewise I found only "carolina" rhododendrons suitable, but I don't find then at local nurseries, so I'm not sure if they are suitable. Can someone suggest azelea and rhododendron varieties for my wind swept hill.