One of Bamboo's blogs has excellent instructions for this. I'll try to find it, and give directions.

Well, I didn't find the one by Bamboo, but I found a good one by Bonkersbon! Put "bonkersbon's blog in the search box above, and then click on the top entry, "bonkersbon's blog: Grows on You". Then click on "Wisteria tips", the second blog from the top. Hope this helps!

I don't have a blog on this, Tugbrethil, which is why you couldn't find it! I knew Bonkersbon had one, so I never wrote one, though I've not read it, I really must!

Sorry, Bamboo. Something, somewhere, in this overstuffed landfill of a brain I've got told me that you had advised me on this! Maybe it was Bonkersbon? I'm too young to get senile!! : /

No, you're not going senile, I've certainly advised on the pruning of Wisteria, and I'm pretty sure you and I had a discussion about it a while back now.

Wheww!! : D