Yep, Eglantyne, that's what I'm suggesting. We've got a few already posted in the Clematis forum. Ice Blue over there is a great example. Outdoors, Louise (Venu209) gets pale blooms... almost white with a bluish-lavender tint. Karenn just posted her photo of Ice Blue growing indoors under lights and it's a vibrant baby blue color. They don't even look like the same cultivar!
