This is the closest thing to a triffid on our list of invaders! Giant hogweed is enormous, much like our native hogweed but on huge scale; fully-grown plants can reach up to 5 metres (that’s over 16 feet)! Giant hogweed was first planted as a striking ornamental in formal gardens over 100 years ago and has been known in the wild for nearly as long. It can quickly dominate over our native flora, spreading by seed via wind dispersal and water courses. Once established, like Himalayan balsam and knotweed, giant hogweed can cause bank erosion and increased risk of flooding. It’s highly toxic and contact with any part of the plant can cause serious and recurring blistering of the skin.
Photo Credit GBNNSS