I used to live in Maryland, and saw Kudzu do some impressive work. Acres of land are covered by one patch.
I now live in New York, and it's starting to show up here.
Fun times ahead...
I now live in New York, and it's starting to show up here.
Fun times ahead...
At some time, in the last 30 years, it exploded.
The trick with Kudzu is that, unlike ligustrum sinense, it invades in a much more literal sense, covering both other plants and the ground itself as far as it can. It 'universally' impedes the growth of other plants, and arguably makes terrain less traversal (if only because it covers what's underneath).
If I'm not mistaken, you can't sell a house, in the UK, if there's knotweed on the property.