From:
http://www.dirtdoctor.com/radio.php?id=330
"My favorite vines include sweet autumn clematis, which is bare in winter but has lots of small fragrant white flowers in late summer..."
Although I do not agree with some of their methods, such as planting the rootball so deep and throwing away greenery in a plastic bag (what is wrong with putting it in the compost pile?!?), you still may find some helpful information here...
http://clematis.org/basics/
Another site:
http://www.homeofclematis.net/html/h_01.htm but again, do not take everything from here as good advice, either. Please do NOT use benomyl!
http://www.pan-uk.org/pestnews/actives/benomyl.htm