In article ,
Bill Grey wrote:

The UK has almost certainly the most resilient ecology in the world,
when it comes to invasive land plants. Excluding the politically
correct blithering, the only two that have caused significant
trouble have been Japanese knotweed and (in a VERY few areas)
Rhododendron ponticum. ...

Not forgetting Himalayan Balsam

Precisely. As I said.

The fact that something is highly invasive under certain conditions
does not make it ecologically, economically or otherwise harmful.
There may be a few places in the UK where it has caused significant
harm, but I have never seen it do so and never seen any definite
evidence that it has done so.


Regards,
Nick Maclaren.