Clematis in zone 3 and 4
What are your clematis success and failures? I am planning on placing an order for some that I can't find locally.
I have jackmanii, Josephine,and Warsaw Nike as established plants. I have added Sweet Autumn, Dr Ruppel , and Comtesse de Bouchaud this summer (crossing my fingers they will come through!)
Anyone have any suggestions for more additions? Also, in the colder zones is Tangutica as invasive?