Environmental management – guidance

Japanese knotweed: managing on development sites

This publication was withdrawn on 11 July 2016

This guidance has been withdrawn from use because the Environment Agency no longer provides best practice guidance. See guidance on preventing harmful weeds and invasive non-native plants spreading weeds for information on controlling specific plants.

Guidance for developers on dealing with Japanese knotweed affecting their sites.



This knotweed code of practice has been written for anyone involved in the development and haulage industry who may encounter sites with Japanese knotweed, or soil containing it.

Related information:

  • Japanese knotweed, giant hogweed and other invasive plants