Vicia japonica
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 many parts of the country. It is closely related to V. amoena. The following notes are based on the general needs of the genus. Succeeds in any well-drained soil in a sunny position if the soil is reliably moist throughout the growing season, otherwise it is best grown in semi-shade. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby.
Propagation
Pre-soak the seed for 24 hours in warm water and then sow in situ in spring or autumn.
Edible uses
Young leaves - cooked. Seed. No more details are given but they are likely to require cooking[K].
Habitat
Thickets and grassy places from the sea shore to the mountains of C. and N. Japan.
Native range
E. Asia - Japan.