I am looking for a vine that can withstand the cold in Zone 5 (Chicago) in containers. I have 2 copper pots that are approx 36" high and 16" square at the top (tapers down to base of about 8 " square). I am looking to grow a vine (preferably fast growing) on a large trellis and there is nowhere other than these pots to put it. I tried grape vines and a couple of other things and they didn't make it through winter. The location gets partial to full sun. The two pots need to cover a trellis approx 20 feet long and 2 feet high above my fence.
I was considering clematis, but think that the metal containers will make the roots get too warm, which I know they don't like.
Thanks