Some really good photos here.
The Magnolia stellata is quite spectacular.
The other plant I really like is the Clematis armandi, it looks very good for you this year, in my garden after the hard winter it has given it's best display ever, what is really good it that it has survived winter as it can be a little difficult in very hard winters, it certainty has been good for you.
I like your Rhododendrons not something I can grow in my garden.
Paul.