Is it Aunt Dee or Blue Moon? They are hardy, most others are not. If it is a hardy variety, I'd try root pruning to 'shock' into changing its ways. Also it should be in full sun for good bloom.

Ted

I have 3 wisteria that have done well for me. Wisteria macrostachys 'Aunt Dee' which took 8 years to bloom. Wisteria macrostachya 'Blue Moon' which is on it's 7th year with no blooms....I hope this summer is the magical summer. ha ha

I also have Wisteria floribunda 'Macrobotrys' which I don't think will ever bloom for me. I have to really mulch this one and cover with bags full of leaves. It grows beautifully but does not seem hardy enough to thrive.

Good luck getting yours to bloom. Sun and fertilizer seemed to assist my Aunt Dee into bloom. Hopefully, it will help my Blue Moon this summer ha ha.

Tj

I don't have either AD or BM. My wisteria did bloom 3 times the first year I had it, and almost every year since it has bloomed at least twice.

With wisteria, fertilizer (esp. a high nitrogen one) will promote green growth, not so much bloom. Wisteria actually do better in less-than-perfect soil.

Appropriate pruning of the vines can encourage bloom (google to find this, I know there's a decent site but don't recall it's name/address).

The best technique though is to root prune. The site I mentioned above talks about this also, with handy-helpful diagrams.

Oh, and full sun is quite important, too. Full sun and then more sun, really! lol

Best wishes getting yours to bloom this year!

Just ran across this on my calendar. It's from the site I mentioned:

To encourage flowering shoots, cut the newest side shoots back about 6 inches from the main branch in midsummer.

In winter, prune the regrowth back to about three nodes (leaves) from their main branch. This will help encourage the growth of flowering shoots in spring.