Japanese knotweed (Fallopia japonica) is an invasive weed that spreads rapidly. In winter the plant dies back to ground level but by early summer the bamboo-like stems emerge from rhizomes (rootstalks) deep underground to shoot to over 7ft, easily suppressing all other plant growth.
Japanese knotweed can sprout from very small sections of rhizomes, so digging out or around the immediate area will potentially cause the weed to spread.
Under the provisions made within Schedule 9 of the Wildlife and Countryside Act 1981, it is an offence to cause Japanese knotweed to grow in the wild.
If found on Wychavon District Council managed land please report to 01386 565199. If found on private land please report to The Environment Agency: 0800 807060.
Please see further guidance on control and other invasive weeds from GOV.UK
Other invasive weeds
What is Giant Hogweed?
Giant Hogweed is an invasive plant species and can be found throughout much of the UK, especially colonising riverbanks where its seeds are transported by the water.
Please do not touch the plant. The sap of giant hogweed can cause burns. If the sap gets onto your skin, then you are exposed to sun, your skin can blister badly, and blistering can recur over months and even years. This is known as phytotoxicity.
Avoid brushing through patches of giant hogweed and exposing yourself to plants which have been cut which might cause you to get sap on your skin.
How to identify?
Stems: Green with purple blotches and stiff, white hairs. Stems are hollow with ridges.
Leaves: Up to 1.5m wide and 3m long and is deeply divided into smaller leaflets. The leaves have irregular and very sharp or jagged edges. The underside of the leaf is hairy.
Flowers: Appear in June and July and are small, white and are clustered on umbrella-like heads known as umbels that can reach a diameter of 60cm.