I have one. I left it in the vine form, my Labor Pool built an arbor along the south side of the house so we can see the blossoms from our window. It's bloomed every year for me, several years has bloomed twice, and one magical year it bloomed 4 times!

What State do you live in,leaveswave wave? My brother lives on a mountain top in Tenn and they have Wisteria bloom many times, also. My tree is very beautiful the rest of the year also, as it has beautiful vines that branch out all over and being a tree, looks very exotic.

We have a 90+ year old wisteria and it blooms 2-3 times a year. It absolutely MUST get a lot of sun. You also need to make sure that you're pruning it at the right time so you aren't pruning off the flower buds. That's the thing I can think of!

I thought Wisteria only blooms on horizontal branches. Maybe your tree form is too vertical? I don't know much about it, so feel free to ignore me!

I planted a wisteria here in the Green Bay WI area southern exposure 12 years ago. No flowers to date but a spectacular tree. Just my 2cents.