not Knot weed?

[angrybird]

I have noticed knot weed popping up everywhere around the Welsh countryside, it only needs a pee size piece to cause havoc in your garden
http://uk.finance.yahoo.com/news/plant-could-cost-home-101756824.html

 

[Penners]

it only needs a pee size piece to cause havoc in your garden

That's a somewhat imprecise measure of size, in my view. Doesn't it depend entirely on the deliverer, and what they drank the night before?

 

[angrybird]

oopsie :lol: