Lilly wrote:

I was hoping some of you might have some wisdom for me. I've had a
white wisteria for about 3 years now, it's always been a good bloomer.
We've lived a year in Washington State now (I've been told we're still
zone 8 even though we're not on the Oly Pen anymore.), we used to live
in Calif. The wisteria came with us, and bloomed fine in both places.
Anyway, I've never pruned it because the fellow who gave it to me said
not to. Now I'm noticing that it has a lot more dead branches than it
used to and very little indication of buds/new growth. I'm wondering
if should I prune it? I'm a little worried now and I'm just not too
sure what I should do. Thanks for any ideas...
~Lilly

Wisteria need heavy and frequent pruning to produce lots of flowers.
Similar to many fruit trees, flowers are produces on spurs. PlantAmnesty
has some of the best pruning information available for this area - this
link should be a big help.
http://www.plantamnesty.org/pruning_...t_wisteria.htm
Right now is an ideal time to prune wisteria, but you will need to do
again several times during the summer - as Cass Turnbull said, "wisteria
is Latin for 'work'."

your climate zone - the majority of western WA is zone 8, specially
anywhere within 30 minutes of the Sound. Higher elevations (Issaquah
plateau, Cascade & Olympic foothills) are probably closer to a 7.

pam - gardengal