Jelgava faces spread of invasive Japanese knotweed

The invasive plant species Japanese knotweed (Reynoutria japonica) is spreading in Jelgava, Latvia. The plant has been identified in several areas of the city, particularly near infrastructure and traffic hubs, including the vicinity of Slokas iela and Meiju ceļš, as well as the intersection of Meiju and Atmodas ielas.

Japanese knotweed is recognized across Europe as one of the most aggressive invasive species. It can rapidly overtake unmaintained or partially managed territories. Its strong root system poses a risk of significant economic damage, as it is capable of lifting paving stones and deforming asphalt.

The State Plant Protection Service (VAAD) notes that Japanese knotweed has been included in the European Union's list of invasive species since June 17, 2025. Due to the plant's deep and powerful root system, which allows it to spread through rhizomes and stem fragments, containment is difficult and requires a long-term approach.

Local authorities are urging residents and landowners to report sightings to the Municipal Operational Information Center at 8787 to assist in mapping the situation and informing the State Plant Protection Service.