is this cheeky? training neighbour's wisteria onto my trellis!

[Escallonia]

before I get flamed, let me explain - I live in a row of terraces and there is another house's garden along the back of our gardens too.

Neighbour's (rented) house has a v overgrown garden, with a mature wisteria in the back corner, completely surrounded by ivy and laurel.

Wisteria every year grows up wildly into the air and then falls over my and other neighbour's fences at the back and also grows through the ivy separating our houses on the side fence, but all tangled in, you can't really see it. It has in the past trained itself along my back trellis and looks lovely. No wood left on my trellis at the moment as I replaced the fence last autumn and the people at the back hacked pruned the wisteria too.

I notice it is starting again to grow on a trajectory high into the air, so have taken the opportunity to actively start training it along my back fence. Is this wildly cheeky? I honestly don't think the neighbours will care but suddenly thought this might be a massive breach of gardening etiquette!

Go for it! With the cost of buying plants now I would take all the freebies I could get

Not at all, everyone does it!

Go for it, wisteria is so beautiful, scented and it does take a number of years to flower so take advantage. It would not offend me in the slightest if a neighbour did this - our neighbours are miserable moaners and even chopped off some beautiful old climbing roses which grew over our dry stone wall onto their side! Enjoy it.

I think that as a courtesy, I'd check they had no objection, but they're hardly likely to object, are they?
I love Wisteria and dh is training ours to cover the whole front of our house.

Remember to prune it in August and Jan.