Invasive Non-Native Plants – A practical handbook for site-managers & supervisors

Invasive non-native plants (INNP) are plant species introduced to the UK over time, that disrupt the growth of native plants and can alter habitats. They can spread rapidly and cause harm to the environment, economy, and human health. Invasive non-native species (INNS) have been identified as one of five main threats to biodiversity globally. It is important to be aware that only non-native plants that cause significant disruption are classed as INNP, and that not all non-native plants are harmful. This guidance focuses specifically on INNP. Further guidance on INNS can be found in ‘Useful Resources’ at the end of the attached document.

Created: 23 June 2026

Last Reviewed: 23 June 2026

Contents

What are invasive non-native plants (INNP)?

Why are INNP a problem?

Pathway Vectors

Biosecurity

Construction Ecological Management Plan (CEMP)

Your Responsibilities

Legislation

Off-site Removal to Landfill

What are invasive non-native plants (INNP)?

Invasive non-native plants (INNP) are plant species introduced to the UK over time, that disrupt the growth of native plants and can alter habitats. They can spread rapidly and cause harm to the environment, economy, and human health. Invasive non-native species (INNS) have been identified as one of five main threats to biodiversity globally. It is important to be aware that only non-native plants that cause significant disruption are classed as INNP, and that not all non-native plants are harmful. This guidance focuses specifically on INNP. Further guidance on INNS can be found in ‘Useful Resources’ at the end of the document.

Why are INNP a problem?

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