Reynoutria — 4 species
Botanical species in the genus Reynoutria recorded in the PlantPeers database.
Reynoutria japonica
Reynoutria japonica
Family: Polygonaceae
Cultivation
Reynoutria japonica is a very cold-hardy plant, being able to tolerate temperatures down to around -25°c when fully dormant. A very easily grown plant, it succeeds in ordinary garden soil in sun or shade, though it prefers a moist soil in partial shade. Japanese knotweed is an extremely invasive plant capable of sending up new shoots at a considerable distance from the main clump and also of growing up through tarmac.
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Reynoutria multiflora
Reynoutria multiflora
Family: Polygonaceae
Cultivation
He shou wu is mainly a plant of temperate to subtropical areas, though it does enter the tropics in southern China and is cultivated in parts of Indo-China. The plant is hardy to at least -15°c when dormant. Succeeds in an ordinary garden soil but prefers a moisture retentive not too fertile soil in sun or part shade.
Full cultivation guide →Reynoutria sachalinensis
Reynoutria sachalinensis
Family: Polygonaceae
Cultivation
Reynoutria sachalinensis is a very cold-hardy plant, being able to tolerate temperatures down to around -40°c when fully dormant. Succeeds in ordinary garden soil in sun or shade. Very tolerant of a wide range of soils from volcanic ash to muddy riverbanks.
Full cultivation guide →