Wisterias can be problematic. I have 'Amethyst Falls' which flowered last year but not this year. It has plenty of sun and decent but not overfertile soil.

My biggest issue will be whether the wisteria will survive here in cold zone 3 winters. I have mine situated on the south side of my home, though does gets filtered sun for a few hours during the afternoon. The soil is good, though I also avoided overly amending it and do not fertilize the plant ... but, now I want to see some blooms!

Terry