 there's a lot near my house where it's just like they're just taking over the whole lot and there's been this whole panic about Japanese knotweed in the US and in Europe because it can infiltrate concrete it can get into people's homes I think until last year in the UK you couldn't get a mortgage on a home if there was knotweed on the property because it's so hard to extirpate it grows in rhizomes so it's like you leave a little fingernail of the rhizome behind it can just reproduce itself so if you see a whole bunch of