It is a highly-invasive species and spreads by distributing seeds.
RHS warn that it poses ‘serious risk’ to people who are unaware of its potential for harm.
In case you are wondering about where giant hogweed is a problem in Hampshire, an interactive map has been created and shows areas where it is most likely to grow.
You can view WhatShed’s interactive map here – and see a screenshot featured in our article.
RHS says that giant hogweed is a relative of cow parsley.
It can grow to 3m tall.