Baine Carruthers wrote:

I applaud your effort ( shame on those who don't appreciate this plant).
Though it can be invasive, it makes a spectacular show.
Here's a url for mine. http://www.irrpro.com/page8.html It's in full sun.
There was a volunteer purple plum that was growing near the wisteria and it
eventually forced me to move the plum to another location.

So the secret it to plant it out in the open where you can use a
combination of mechanical and chemical attacks to keep it under
control. BTW, was that the remains of your house that's holding it up?
:-)