Bristol remains England’s Japanese knotweed capital
Bristol remains England’s Japanese knotweed capital with 32.29 incidences per square mile, double the rate of the second-ranked region.
Bristol has retained its status as the leading area for Japanese knotweed infestations in England, according to new analysis by Environet. The city recorded more than twice the infestation density of any other region, highlighting a significant concentration of the invasive plant species within its boundaries.
Data from the report identified 1,324 specific incidences of Japanese knotweed across Bristol, equating to a density of 32.29 cases per square mile. This figure substantially exceeds the rates found in other major English regions, establishing a clear disparity in infestation levels between Bristol and the rest of the country.
Merseyside ranked second with 13.45 incidences per square mile, followed by Greater London at 7.67 per square mile. Greater Manchester and Lancashire also appeared in the top rankings, though their densities remained significantly lower than Bristol’s, which continues to hold the highest recorded concentration.