Panax japonicus Seeds | Japanese Ginseng

Japanese Ginseng (Panax japonicus) with palmately compound leaves and a cluster of small red berries — Japanese Ginseng (*Panax japonicus*): Araliaceae, the bamboo-ginseng of Japanese mountain woods, a shade herb with red berries.

LATIN NAME: Panax japonicus

COMMON NAME: Japanese Ginseng

Plant Profile

Japanese Ginseng is a low, erect perennial of the shaded mountain woods of Japan and southern China, growing thirty to sixty centimetres tall from a thick, knuckled rhizome that resembles a string of bamboo joints, the source of its Japanese name. Each stem carries a whorl of palmately compound leaves, and in summer small greenish-white flowers open in an umbrella cluster, followed by a head of small, round, red berries.

It is a plant of deep, cool, leafy shade, not the open border, and it needs moisture-retentive, humus-rich soil. The rhizome is the harvest, and it takes five or more years to reach worthwhile size. The berries ripen to a bright red in late summer and hold into autumn, the brightest moment of the plant’s quiet year in the shade.

Science & Biotechnology

The rhizome’s saponins, the chikusetsusaponins, have been characterised and compared with those of Asian ginseng, and the species is a standing subject in ginseng-chemistry work, generally regarded as gentler in action than its famous relatives.

Cultivation studies address its exacting shade and soil requirements, and the slow maturation of the rhizome, measured in years rather than seasons, shapes every account of growing it. Comparative work on the chikusetsusaponins has shown structural differences from the ginsenosides of Asian ginseng, supporting the traditional distinction between the two as different in character, not merely weaker. Researchers continue to survey the Panax genus across East Asia, and this species’ rhizome anatomy, with its bamboo-joint nodes, has been used in keys to separate the group.

Uses & Benefits

In Japanese and Chinese mountain traditions the rhizome is used as a gentler cousin of ginseng, for coughs and general tonification, a professional matter. In the shade garden it is a red-berried woodland herb of quiet, sculptural presence.

A patch of bamboo-ginseng under mature trees, its whorled leaves and red berry heads repeating down a shaded bed, is one of the understated pleasures of woodland gardening. In Japanese mountain regions the rhizome is sometimes chewed fresh as a mild bitter tonic, a custom noted in rural accounts of the plant. Collectors of woodland medicinals grow it alongside goldenseal and its Chinese relatives, forming a shade-garden understory of plants whose value lies underground.

Growing from Seed

Sow fresh seed in autumn into a leafy, humus-rich compost, keep it shaded, cool and evenly moist, and expect germination the following spring; stratification over winter is part of the rhythm.

Grow the seedlings in deep shade with steady moisture, pot on gently, and plant out into a woodland setting or a deep, shaded frame. Mulch with leaf mould each year and leave the rhizomes undisturbed for five years or more. Watch for slugs and vine weevil in the shaded bed, the two pests that account for most losses, and refresh the leaf-mould mulch every autumn. Where summers are hot, a north-facing wall or the shade of a mature tree is essential; the leaves scorch quickly in any direct midsummer sun.

Our Take

The bamboo-ginseng of the mountain woods: whorled leaves, red berries, and a knuckled root that wants five years of cool shade. Patience is the only technique.

Herb Seeds