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Winged Bean

Psophocarpus tetragonolobus
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Psophocarpus tetragonolobus (Winged Bean) — botanical photograph
Pl. 41AB — Psophocarpus tetragonolobus
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I

Overview

Winged Bean (Psophocarpus tetragonolobus), a perennial climbing vine native to Tanzania, can grow up to 2 meters in height and thrives in full sun with moist soil that ranges from light sandy to heavy clay. Hardy in zones 8-12, this versatile plant is well-suited for warm climates and serves multiple purposes, including as an edible and ornamental addition to gardens. The winged bean offers a variety of parts for consumption, such as flowers, leaves, roots, seeds, seedpods, shoots, and stems. One distinctive feature of the plant is its quadrangular pods, which are key in identifying the species. This leguminous vine is known for its utility as a cover crop, oil source, soil reclamation tool, and nitrogen fixer. It has been introduced to various regions including Assam, Bangladesh, Bismarck Archipelago, Brazil North, Cambodia, China South-Central, Christmas Island, East Himalaya, Egypt, Florida, Ghana, Hainan, Honduras, India, Ivory Coast, Jawa, Laos, Lesser Sunda Islands, Malaya, Maluku, Marianas, Myanmar, Nepal, New Guinea, Nigeria, Philippines, Sierra Leone, Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Trinidad-Tobago, Vietnam, West Himalaya, and Zambia. Its edible uses include oil, coffee, and coloring, making it a valuable plant in both culinary and practical contexts.

Quick answers

What is Winged Bean?

Winged Bean (Psophocarpus tetragonolobus), a perennial climbing vine native to Tanzania, can grow up to 2 meters in height and thrives in full sun with moist soil that ranges from light sandy to heavy clay.

Growingconditions · propagation · uses
V

Cultivation

Winged Bean thrives in full sun and requires moist soil that can be light (sandy), medium, or heavy (clay). It is a perennial that grows up to 2 meters tall and is hardy in zones 8-12. For propagation, seeds can be sown directly into the garden after all danger of frost has passed. This versatile plant offers edible parts including flowers, leaves, roots, seeds, seedpods, shoots, and stems.
Light
Full sun
Water
Moist
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
8-12
Life cycle
Perennial
Mature size
2.0 m tall
Seed viability
3-5 years
For first-time growers

How to grow Winged Bean for the first time

8steps

Start with winged beans by providing full sun, moist soil, and basic care for a rewarding first gardening experience.

  1. 1

    What you'll need

    Seeds or seedlings, a sunny spot in your garden, and some compost.

  2. 2

    Best time to plant

    Plant winged beans after the last frost when soil temperatures are above 18°C (65°F).

  3. 3

    Soil and container prep

    Ensure the soil is well-draining, with a pH between 6.0 and 7.5.

  4. 4

    Sowing or transplanting

    Direct sow seeds 1-2 cm deep in rows spaced about 30 cm apart; or start seedlings indoors and transplant them later.

  5. 5

    First two weeks

    Keep the soil consistently moist, especially during germination. Provide light shade if temperatures are very high.

  6. 6

    Ongoing care

    Water regularly to keep the soil moist but not waterlogged; fertilize with compost every few months.

  7. 7

    Harvest or pruning

    Prune vines as needed for support and remove dead leaves. Harvest young shoots, flowers, and pods when they are tender.

  8. 8

    Common mistakes

    Overwatering, planting too early in cold soil, neglecting to provide support structures, and not harvesting regularly.

VI

Edible & utility

Edible parts:FlowersLeavesRootSeedSeedpodShootsStem
Edible uses: Oil, Coffee, Colouring
Other uses:Cover cropoilSoil reclamationNitrogen fixer
Contextrange · companions · related
VII

Distribution

1 native · 41 introduced
Distribution across3 continents· 1 native· 41 introduced
Asia12 regions
introduced (12)BangladeshCambodiaChinaIndiaLaosMyanmarNepalPhilippinesSri LankaTaiwanThailandVietnam
Americas1 region
introduced (1)Honduras
Africa8 regions
native (1)Tanzania
introduced (7)CameroonCôte d'IvoireEgyptGhanaNigeriaSierra LeoneZambia
Broader regions
introduced:Bismarck Archipelago, Brazil North, Brazil Northeast, Brazil South, Caroline Is., Christmas I., East Himalaya, Florida, Hainan, Jawa, Lesser Sunda Is., Malaya, Maluku, Marianas, New Guinea, Sulawesi, Sumatera, Trinidad-Tobago, West Himalaya
IX

Specimen gallery

1 image
Psophocarpus tetragonolobus (Winged Bean) — botanical photograph
Winged Bean (Psophocarpus tetragonolobus)
XI

Explore further

Companion planting
Growing zone
Native to
XII

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