Wisteria pruning !!!

[the prettiest star]

Hi
I have a Japanese Wisteria trained to a 15 ft tall south facing wall. Width is approx 40 ft. I have been told the plant is approx 25 yrs old and it flowers very well. My problem is that it has not been pruned for several years and has grown out from the wall and is monopolising my terrace. When viewed from the side it is like an upturned U shape, it has grown to the wall top and then fallen away from the wall and come back down to ground level. I would like the plant to be tight back to the wall and then I could follow the textbook twice yearly pruning, but I am unsure how it would react to severe cutting back.
Any advice welcome, thanks in advance.

[rustylady]

Found this link for you - Royal Horticultural Society | Advice Search | Wisteria: pruning It doesn't say about hard pruning, but I think you should be able to get away with it. Maybe do it in stages?

[vicky]

I knew someone who cut theirs down to the ground (it was massive) and it returned ok. I think you'd be ok to cut off the bit that's fallen away from the wall and 'start again' from there.

[queen of the cobs]

you can be pretty firm with them and they will come back - my parents had a wisteria that was about 20 years old and they cut it back radically a few years ago - it's never looked back and is glorious each year, but without being completely overgrown - be brave!

[HeyWayne]

I'm sure I had a copy of Gardeners World somewhere that featured Wisteria care as the main story. If I can find it, it's yours.

I don't have Wisteria, ever since I started taking the tablets.