From an English Country Garden

Gunnera or Giant Rhubarb is a large, popular, semi-aquatic plant from South America. It takes pride of place in the UK gardens of stately homes, universities and botanical collections. Gunnera now been classified as an invasive species. It spreads quickly, killing local flora by outshading them. In the UK, there are no specialist herbivores for this plant (https://www.theguardian.com/environment/2023/dec/08/uk-bans-popular-garden-plant-gunnera-after-study-finds-it-an-invasive-species). Gunnera consequently joins Japanese knotweed, Himalayan balsam, Rhododendron and Water hyacinth etc. as UK environmental problems created by gardeners. More care should be taken before introducing alien plant species.