In article , Sacha
writes
Only you really know how much frost your garden gets etc. Charlie is right
about wall protection, though. However, round here, Wisterias are grown
over arches and pergolas to create avenues and along the wooden rails of
bridges etc. It will all depend on just how sheltered your garden is,
really.

Ours is flowering happily on a pergola in Yorkshire, in a shaded garden.
Latest frost can be up to first week of June, but the wisteria doesn't
flower till after that. Maybe it can cope better with consistent late
frosts, rather than late frosts which happen some years and not others?
--
Kay
"Do not insult the crocodile until you have crossed the river"