Rumex japonicus
At a glance
- Lifecycle
- Perennial (hardy)
- Exposure
- Full sun
Cultivation
We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in most parts of this country. The following notes are based on the general needs of the genus. Succeeds in most soils but prefers a deep fertile moderately heavy soil that is humus-rich, moisture-retentive but well-drained and a position in full-sun or part shade.
Propagation
Seed - sow spring in situ. Division in spring.
Edible uses
Leaves - cooked. Seed - cooked.
Material uses
Although no specific mention has been made for this species, dark green to brown and dark grey dyes can be obtained from the roots of many species in this genus, They do not need a mordant.
Habitat
Wet meadows and ditches in lowland all over Japan.
Native range
E. Asia - China, Japan, Korea.