The problems caused by Giant Hogweed
The distribution and frequency of Giant hogweed is increasing over time and this is causing significant problems for homeowners and those responsible for managing public spaces due to the harmful nature of the leaves which, when touched, can cause painful blisters when the skin is exposed to the sun (so-called photo-sensitisation).
Quite apart from this feature, Giant hogweed is a major concern from an ecological point of view too. It occupies a similar habitat to Himalayan balsam (by rivers, canals etc.) and they are often seen together. The huge size of the leaves (2m span is not untypical) cuts-off any sunlight reaching the soil so there can be major changes to the local plant communities and all the invertebrates that depend on them.
The law regarding Giant Hogweed
Under the Wildlife and Countryside Act 1981 and the Wildlife and Environment (Scotland) Act 2011 it is an offence to introduce giant hogweed into the wild. Although you are allowed to have giant hogweed on your own land you should take measures to limit its spread onto adjacent land. If not the adjoining landowner could take legal action against you.
It is also worth noting that Giant hogweed, like other ‘Schedule 9’ invasive weeds, is a controlled waste under the Environmental Protection Act and should be (together with soil containing its seeds) be disposed of at a licensed landfill site.