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Summary
May be known as Lathyrus japonicus maritima.
Physical Characteristics

Lathyrus japonicus maritimus is a PERENNIAL growing to 0.6 m (2ft).
See above for USDA hardiness. It is hardy to UK zone 3. It is in flower from May to August, and the seeds ripen from August to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, Lepidoptera (Moths & Butterflies).
It can fix Nitrogen.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil. The plant can tolerate maritime exposure.
UK Hardiness Map
US Hardiness Map
Synonyms
L. maritimus.
Plant Habitats
Cultivated Beds;
Edible Uses
Edible Parts: Leaves Seed Seedpod Shoots
Edible Uses: Coffee
The immature seeds are eaten raw or cooked like peas[183, 257]. Mature seeds are cooked or sprouted and used in salads[183]. A delightful vegetable[172]. A famine food[177]. Very bitter[2, 105, 106]. Some caution is advised, see the notes above on toxicity. Young seedpods - raw or cooked when less than 25mm long[105, 106, 183]. A sweet flavour[106, 172]. Young plant - raw or cooked[161]. Use young shoots that are less than 25cm long[172, 213]. The roasted seed is a coffee substitute[61, 183, 257].
References More on Edible Uses
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
None known
References More on Medicinal Uses
Other Uses
References More on Other Uses
Cultivation details
An easily grown plant, succeeding in any moderately good garden soil[1]. Prefers a deep moist well-drained soil in a cool position[187]. Prefers a position in full sun, growing well on hot sunny banks[200]. The seed remains viable for 4 - 5 years in sea water[200]. 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[200]. For polyculture design as well as the above-ground architecture (form - tree, shrub etc. and size shown above) information on the habit and root pattern is also useful and given here if available. Growth habit is herbaceous. The plant growth habit is a suckering vine sending up suckers some distance main plant [1-2]. The root pattern is rhizomatous with underground stems sending roots and shoots along their length [1-2].
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
Type a value in the Celsius field to convert the value to Fahrenheit:
Fahrenheit:
Plant Propagation
Pre-soak the seed for 24 hours in warm water and then sow in early spring in a cold frame[200]. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. If you have sufficient seed, then it can also be sown in situ in mid spring[200]. Division in spring. It may not transplant well so care should be taken[200].
Other Names
If available other names are mentioned here
Native Range
TEMPERATE ASIA: China Southeast, Japan, Kamchatka, Khabarovsk, Korea, Kuril Islands, Magadan, Manchuria, Nansei-shoto, North European Russia, Northwest European Russia, Primorye, Sakhalin, Yakutskiya,China North-Central. NORTHERN AMERICA: Aleutian Islands, California, Connecticut, Illinois, Indiana, Labrador, Maine, Manitoba, Massachusetts, Minnesota, Newfoundland, New Hampshire, New Jersey, New York, North Dakota, Nunavut, Ohio, Ontario, Oregon, Quebec, Rhode Island, Vermont, Washington, Wisconsin, EUROPE: Baltic States (Estonia, Latvia, Lithuania), Belgium, Denmark, Finland, Germany, Great Britain (United Kingdom (U.K.)), Iceland, Ireland, Norway, Poland, Sweden,
Weed Potential
Right plant wrong place. We are currently updating this section.
Please note that a plant may be invasive in one area but may not
in your area so it's worth checking.
Conservation Status
IUCN Red List of Threatened Plants Status :
IUCN Red List
Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.
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Expert comment
Author
(L.)P.W.Ball.
Botanical References
17200
Links / References
For a list of references used on this page please go here
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Subject : Lathyrus japonicus maritimus
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