Invasive Plants

Cornwall's landscape is important to the local economy. It is also of national and international importance. Twenty-seven per cent of the County is designated an Area of Outstanding Natural Beauty (AONB) and a further 24% as Area of Great Landscape Value (AGLV). The landscape is formed from a combination of climate, geology, natural features and human activity.

Invasive weeds

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Cornwall's landscape is highly managed. Some practices or changes in management regimes have had unfortunate side effects. Our increased interest in gardening and exotic plants over the last 200 years has led to a great number of introduced species and cultivars. Many have made Cornish gardens the envy of the world. Some species have made themselves at home and have become invasive. , They have spread over the garden hedge and into the countryside. This has displaced our natural flora. Cornwall is currently pioneering work in the control of invasive alien weeds such as Japanese knotweed. There are also a few problem native invasive weeds, such as common Ragwort. This requires careful and co-ordinated management to limit its spread.