Clematis: OK, so what's the real deal? Sun or part sun?, 0 by pirl

pirl wrote:
I am not an expert but from my own experience, up here on Long Island - zone 7...

Bourbon can take some shade.
Pink Champagne loves the sun here.
Niobe is finicky for me so it's a difficult clematis with some sun or full sun. It has to be my inadequate location for the plant.
HF Young loves sun here.
Marie Louise Jensen is one my California friend grows but I have no idea just how much sun it gets.
Our Henryi is near Bourbon and does fine with 4 hours of early morning sun.

You have several on your list that I have never grown so I can't help you out with those, sorry!

Have you tried seeing what clematis sites have to say about each of them?

Use much more mulch than you think you should to keep the roots cool and moist.