Posted in Uncategorized Giant Hogweed: Map shows where toxic plant growing in North East November 20, 2022 Giant hogweed (Heracleum mantegazzianum), native to the Caucasus mountains in southwest Russia and Georgia, can grow up to 5m tall, has sharply serrated leaves, and green and purple splotchy stems. https://www.thenorthernecho.co.uk/news/20202521.giant-hogweed-map-shows-toxic-plant-growing-north-east/