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Lathyrus tuberosus - L.

Common Name Earthnut Pea, Tuberous sweetpea
Family Fabaceae or Leguminosae
USDA hardiness 5-9
Known Hazards Although no records of toxicity have been found for this plant, the seed of some species in this genus contain a toxic amino acid that can cause a severe disease of the nervous system known as 'lathyrism' if they are eaten in large amounts (although small quantities are said to be nutritious)[65, 76]. Great caution is advised.
Habitats Cornfields and hedgerows, avoiding acid soils[17].
Range Europe to W. Asia. Naturalized in Britain in a very few sites in E. England.
Edibility Rating    (5 of 5)
Other Uses    (3 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Fully Hardy Moist Soil Semi-shade Full sun
Lathyrus tuberosus Earthnut Pea, Tuberous sweetpea


Lathyrus tuberosus Earthnut Pea, Tuberous sweetpea

 

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Summary


Physical Characteristics

 icon of manicon of flower
Lathyrus tuberosus is a PERENNIAL growing to 1.2 m (4ft).
See above for USDA hardiness. It is hardy to UK zone 6 and is not frost tender. It is in flower from June to July, and the seeds ripen in August. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees.
It can fix Nitrogen.
It is noted for attracting wildlife.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

Woodland Garden Sunny Edge; Dappled Shade; Hedgerow;

Edible Uses

Edible Parts: Root
Edible Uses:

Root - cooked or raw[2, 27, 46, 61, 105]. Sweet and starchy, it is delicious when baked with a flavour that is somewhat like a sweet potato[183, K]. Taste trials consistently place this root very highly, it is certainly one of our favourites[K]. Unfortunately, yields are rather low and so the plant is only worthwhile growing as a taste treat, not as a staple crop[K].

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

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Other Uses

Nitrogen fixer. Attractive flowers. Attracts wildlife.

Special Uses

Attracts Wildlife  Food Forest  Nitrogen Fixer

References   More on Other Uses

Cultivation details

An easily grown plant, succeeding in any moderately good garden soil[200]. It prefers a limestone soil in a warm position[13], and likes some shade[1]. A climbing plant, scrambling through other plants and supporting itself by tendrils[219]. It tends to be slightly invasive[187] with new stems emerging at some distance from the parent plant[219]. The earthnut pea has occasionally been cultivated for its edible root[2, 183]. Slugs are inordinately fond of this plant and will totally destroy it given a chance[K]. A good bee plant. 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. A suckering vine sending up suckers some distance main plant [1-2]. The root pattern is tuberous with swollen potato-like roots [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:

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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 of the tubers when the plant is dormant in spring or autumn.

Other Names

If available other names are mentioned here

Native Plant Search

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Found In

Countries where the plant has been found are listed here if the information is available

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 :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Lathyrus alatus Perennial0.6 -  LMHSNM10 
Lathyrus aphacaYellow-Flowered PeaAnnual0.9 -  LMHNDM11 
Lathyrus ciceraChickling Vetch, Red peaAnnual0.0 0-0  LMHNM10 
Lathyrus davidii Perennial1.2 5-9  LMHSNM10 
Lathyrus japonicusBeach Pea, Smallflower beach peaPerennial0.6 3-7  LMHNDM20 
Lathyrus japonicus maritimusBeach PeaPerennial0.6 3-7  LMHNDM203
Lathyrus latifoliusPerennial Sweet Pea, Perennial peaPerennial Climber2.0 5-9 FLMHSNDM102
Lathyrus linifolius montanusBitter VetchPerennial0.6 5-9  LMHSNM203
Lathyrus nervosusLord Anson's PeaPerennial Climber0.5 8-11  LMHNM20 
Lathyrus ochroleucasCream PeavinePerennial1.0 -  LMHSNM11 
Lathyrus ochrusCyprus VetchAnnual0.6 -  LMHNDM10 
Lathyrus odoratusSweet Pea, Wild Pea,VetchlingAnnual Climber2.0 2-11 FLMHSNM103
Lathyrus ornatusBush VetchlingPerennial0.3 3-7  LMHNDM11 
Lathyrus palustrisSlenderstem Peavine, Marsh peaPerennial Climber1.2 4-8  LMHNMWe10 
Lathyrus polymorphusManystem Peavine, Hoary peaPerennial0.4 0-0  LMHNM10 
Lathyrus pratensisMeadow VetchlingPerennial1.2 4-8  LMHNMWe011
Lathyrus quinquenervius Perennial0.6 -  LMHNMWe10 
Lathyrus sativusChickling Pea, White peaAnnual0.6 0-0  LMHNM213
Lathyrus sylvestrisFlat pea, Wood peaPerennial Climber1.5 6-9 FLMHSNM003

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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Subject : Lathyrus tuberosus  
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