Superwisteria

How on earth can I kill of for good and all the b....y wisteria that I unwisely planted in the wrong place?  After letting the thing get its toes really embedded and developing a somewhat hefty trunk, it was decided it was really in a prime position to knock the house over, so we cut it back last Autumn and applied stump killer. It came back strong and green in the Spring. More stump killer, wisteria says "no".   I Let the leaves grow back a bit and applied Roundup - dead , dead? No, just a little browned off. 2 months later back it popped again a bit further away - anyway the thing has been roundupped 4 times and STILL won't die. It is sitting outside thumbing its nose at me as I write. Short of dynamite, any ideas?? 

no unspoken rules, just that you have already tried everything I could think of.

If you keep killing each bit as it appears it will eventually give up - that's the only advice I have

Unless, of course, you are up to digging out the roots 

Flame thrower, maybe?

Yes Yorkie, we did cover it up well.

 I like the flame thrower but I'm not sure the surrounding plants would ! 

Copper nails? Not heard that one before Grinling, mind you, never seen a copper nail either, but thanks for the suggestion. Might be easier to find copper sulphate - would I be correcct in supposing that copper sulphate is not bordeaux mix but something intrinsically deadly?

Mum, I think we are going to have to carry on with the same treatment, if the copper sulphate won't work , or I can't find any. No, digging out the roots is not an option - it'd mean digging up the swimming pool terrace and that was built to resist earthquake, cos we live in a place that shakes from time to time!

Thanks for that! Has anyone tried an air to ground missile in this circumstance?