More aliens on the way

[Tursiops2]

As if Japanese Knotweed wasn't enough...
BBC - Earth News - Alien plant invaders threaten UK National Parks
T2

[The Woodman]

I inherited piri piri in my garden and after years of cursing when the hooked seeds caught in my clothing each back end I have now exterminated the plant with glyphosate.

[JennyS]

Another useful 'ground cover' plant widely available from garden centres!

[Jim Ford]

When I was at Lindisfarne a few years ago there were warnings posted about the plant by entrances to the dunes. They stated that dogs get covered with the burrs which cause them distress.

Crassula is a serious problem at College Lake in Bulbourne.

Jim

[Adam Cheeseman]

Pity they haven't listed Goat's-rue, as this could be one of the next big ones in grasslands. Many of the rest are pretty much here already.