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ORNAMENTAL PLANTS OF HORTICULTURE VALUE

Selection of perennials

Reynoutria Houtt.
Reynoutria, Japanes knotweed
Polygonaceae

About 15 species in Temperate Asia. Closely related to Polygonum L.

R. sachalinensis (F. Schmidt) Nakai (Polygonum sachalinense F. Schmidt)

Far East (southern Sakhalin, southern Kuril Islands) and northern Japan. Along streams, on gravelly and sandy soil, among shrubs. Also creates a tall-herb formation.

Stems 1.5-3 (-4) m. Unbranched or sparsely branched. Rhizome creeping, horizontal, deep-lying (70-100 cm below soil surface). One plant can cover an area of 30 square meters. Leaves shortly petiolate, oblong, 20-40 cm x 10-20 cm. Inflorescence short, axillary, flowers white. V - mid spring to late autumn. Fl - July for one month. Fr - September, not every year. Propagated by division (runners) and seed. Grows in full sun and also in partial shade. Creates a herbaceous thicket and can grow in sites of low maintenance. Z 4.

SELECTION OF PERENNIALS
 
 
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