We have 4 very large buddleia plants taking over our yard as I type. I love the fact they attract lots of butterflies and bees, but by god they are ugly/messy when they get this big!
Hopkirk, we have one growing by our side gate...has to be regularly cut back otherwise we can't get through the gate. Obviously not the ideal place for it!
Triffids are here under other disguises as well Hopkirk....bally Japanese Hogweed, and Himalayan Balsam ! The latter seems to be taking over mid-Wales at any rate.