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Japanese Knotweed
Seasonal Guide

What does Japanese Knotweed look like? Explore our seasonal gallery to see how the plant changes throughout the year.

Identifying Japanese Knotweed in Every Season

Japanese Knotweed changes dramatically in appearance as the year progresses, making it notoriously difficult to identify with confidence. Our Seasonal Guide walks you through exactly what to look for across Spring, Summer, Autumn and Winter — from the first red-tinged shoots of March to the brittle standing canes of winter — so you can recognise an infestation at any time of year.

Whether you are a homeowner, buyer, tenant, property surveyor, gardener or local authority, knowing how Japanese Knotweed looks throughout the seasons helps you act early and avoid the significant costs and legal risks of an untreated infestation. Use the gallery below to compare what you have found against verified, season-by-season photographs taken by our own surveyors.

Spring
Summer
Autumn
Winter
Young Japanese Knotweed plant with heart-shaped leaves growing beside a wooden fence
Photo Gallery

Japanese Knotweed Photo Gallery

Browse our extensive collection of real Japanese Knotweed photographs taken by our surveyors during site visits, client surveys, treatment programmes and excavation projects across the UK. These images show what Japanese Knotweed looks like in different seasons, settings and stages of growth to help you identify it on or near your property.

About These Japanese Knotweed Photos

All photographs in this gallery were taken by the Japanese Knotweed Agency team during real site surveys, treatment visits and excavation projects. They show Japanese Knotweed in various stages of growth — from early spring shoots to autumn dieback and winter canes — across residential gardens, commercial sites, railway embankments and development land throughout England and Wales.

If you suspect you have Japanese Knotweed on or near your property, use our free identification service or book a professional survey today.

Do you think you have Japanese Knotweed on or near your property?

Use our free identification service today and get a response within 30 minutes *

FREE IDENTIFICATION SERVICE