Origin: Central and East Asia (China, India, Afghanistan)
First finding in Slovenia: not yet found in Slovenia
Pathways: ornamental plant
Possible to find: year round
Flowering season: July – September
Habitat: Forests, scrubland, and open areas.
Status in Slovenia: In Slovenia not yet found in nature. Invasive in northern Europe; naturalised in Central Europe.
Similar species: Large knotweeds: Fallopia japonica, Fallopia x bohemica, Polygonum orientale. Native knotweeds are much smaller (among others: P. persicaria, P. hydropiper and P. mite.
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