Thank you Chris for this wonderful article. I have dreamt about having a clematis for some years, but still have not got one. I have seen a few here in Iceland, probably the hardiest of all not the ones with the fancy flowers. We have short summers here with temps varying from 60°- 65°F (higher in sheltered gardens) during the day from June until middle September, and we have cool winters, not really hardy. I sure would like to try growing them. Which ones do you thing would make it here ?