6/9. The Native Plants Are Restless. Alien plants grab the headlines. Whether they've escaped from gardens or been introduced accidentally, plants like Japanese knotweed are painted as villains, with huge amounts of money and time being spent trying to eradicate them. But are the conservationists overlooking native plants, such as bracken and bramble, that may be more of a threat to sensitive habitats and vulnerable species?
Paul Evans asks if we've achieved the right balance in dealing with unwanted plants. Producer Brett Westwood