This is my little wisteria tree in SJC. Growing a wisteria tree is a true act of patience because it takes many years for it to really look like anything other than a goofy mistake. If I hadn't seen a gorgeous old one at a local nursery I would have never attempted it. It will be years before the 'trunk' gains any girth and it will have to be pruned aggressively a number of times a year, but I hope it will be worth it.
I have a white one in Laguna that I have had for about six years and it is still in that awkward stage, not really a tree, not really a vine, but I keep hoping. The trouble with the white one is it is planted in the middle of a garden bed and it blends in with the white flowers of a spirea that blooms at the same time behind it. The lesson here? Think about the background of a plant that you want to be a focal point.