Pretty plants can have ugly impacts. This is especially true with knotweed, a fast spreading and potentially destructive plant with bamboo-like stems, the plant can cause structural damage by pushing through concrete, asphalt and drainage systems. It also displaces other plant life, causes erosion and pollutes streams with sediment from the eroded land.
Native to Asia, there are four knotweed varieties in the province: Himalayan, Japanese, Giant and Bohemian. All grow in the Fraser Valley...