Do you know the name of this plant, it seem like growing in my garden..chezs

You know i will have to look and see because i have it running rampant in my garden to! (Its a little bit of a pest)

This is Persicaria, commonly known as Knotweed.

Iv this & think its alovely colour :)

Oops, did I say it is Persicaria ? I meant Polygonum ..... still commonly known as Knotweed though .