Non-native species - Low risk of Impact
EcologyThe GB Non-native Species Secretariat (2011) note: It is generally considered to be non-invasive owing to its limited dispersal ability, although it can become abundant in gardens. It spreads over short distances (a patch 12 m across has been recorded in Cardiganshire) by stolons. Seed is not produced in GB. Dispersal of rhizomes is the main mechanism of dispersal, usually deliberately, but on riverbanks and roadsides this can occur naturally or accidentally. In towns throughout GB; generally established in the wild only in the west. See:
Records submitted to Data Centre in 2021
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GB Non-Native Species Secretariat (2011). Lesser Knotweed, Persicaria campanulata. Available online: http://www.nonnativespecies.org/factsheet/factsheet.cfm?speciesId=2598 [Accessed: 29/11/2017)