In article ,
david taylor wrote:
We've had many communications on horsetail, particularly because it is
impossible to eliminate. It must be sensitive to growing
conditions/competition from other plants otherwise it would take over the
country.
Can anyone put any definition as to its preferences or vulnerabilities?

"It"? There are a fair number of species native to the UK. Generally,
damp soils where they can get their roots down, but the common horsetail
is pretty widespread. I don't know why it only rarely becomes an
invasive plant.


Regards,
Nick Maclaren.