Yes, this is a vigorous climber that requires strong support.

Can I eat the leaves?

Yes, they are often used like spinach in stir-fries.

Plant guide

Winged Bean.

Psophocarpus tetragonolobus

Pronounced so-fo-KAR-pus tet-ra-go-no-LO-bus

Also known as Four-angled Bean, Goa Bean, Goa-bean, Winged Bean, asparagus-pea, four-angle-bean, princess-pea, winged-bean

The winged bean is a tropical legume known for its edible pods, leaves, and tubers. It thrives in warm, humid climates and grows as a vigorous climbing vine. You will love how productive this plant is in your garden.

Another photo of Winged Bean — Photo by Ong Jyh Seng (CC BY-SA) via iNaturalist

At a glance

Care level: Moderate
Plant type: Annual legume
Light: Full sun
Indoor light: Direct sun
Water: Every 2 to 4 days
Mature size: 3 to 4 meters
Growth rate: Fast
Hardiness: USDA 9 to 12
Bloom time: Late summer to autumn

Care

Provide a sturdy trellis for this climber to scale as it grows quickly. Keep the soil consistently moist but not waterlogged to encourage pod production. Watch for yellowing leaves which can indicate poor drainage or nutrient deficiency.

Watering: Keep the soil evenly moist throughout the growing season.
Feeding: Use a balanced fertilizer low in nitrogen to support flowering.
Pruning: Trim back excessive foliage to improve airflow and focus energy on pod development.
Repotting: This plant is typically grown as an annual and does not require repotting.
Soil: Well draining loamy soil
Soil pH: 6.0 to 7.0
Temperature: 15 to 35°C
Humidity: 60 to 90%
Drought tolerance: Low
Lifespan: Perennial, typically grown as an annual
Fragrance: Light
Deer and rabbits: Moderate

Signs it needs repotting

Roots growing out of the drainage holes.
Water running straight through the pot without soaking in.

Safety

People: Raw consumption of the seeds or pods can cause digestive distress due to high levels of trypsin inhibitors.
Children: The seeds are small and hard, posing a potential choking hazard if left unattended.
Contact allergens: The foliage can cause mild skin irritation in sensitive individuals.
Airborne allergens: Pollen may trigger mild reactions in those with severe legume allergies.
Edibility: Always cook the pods and seeds thoroughly to neutralize anti-nutritional factors before consumption.

How to identify it

Four distinct longitudinal wings on pods
Compound leaves with three leaflets
Bright blue or white pea flowers
Vigorous climbing vine habit

Height: 3 to 4m
Spread: 0.6 to 1m
Leaves: green, deciduous
Flowers: blue, white, purple, 2 to 4cm
Fruit: green, purple, Autumn

Problems to watch for

AphidsCommon
Powdery MildewCommon
Pod BorerUncommon
Root RotUncommon

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: Spring
Overwintering: In frost-prone areas, treat it as an annual and harvest before the first freeze. In tropical zones, cut back dead vines to encourage new growth in spring.
In containers: It can grow in large containers of at least 20 liters, provided you supply a tall trellis.

Seed Sowing

1. Soak seeds in water for 24 hours to soften the hard coat.
2. Plant seeds 2 cm deep in warm, well-draining soil.
3. Keep soil consistently moist until germination occurs.

Plant near tall crops to provide the necessary vertical space for the vines to spread.

Grows well with

Corn · Corn provides a sturdy natural trellis for the climbing beans.
Cucumber · They share similar moisture and heat requirements.

Similar species

Common Bean · Both are nitrogen-fixing legumes used for their edible pods.

Science

Family: Fabaceae
Genus: Psophocarpus
Order: Fabales
Class: Magnoliopsida
Native range: Tropical Asia and Papua New Guinea
Conservation: It is widely cultivated in tropical regions and is not considered threatened.

It is a perennial vine that acts as an annual in cooler climates, fixing nitrogen to thrive in nutrient-poor soils.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: culinary vegetable, nitrogen-fixing cover crop, ornamental vine

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 6/9
Light: 8/9
Temperature: 9/9
Moisture: 7/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Do I need a trellis?: Yes, this is a vigorous climber that requires strong support.
Can I eat the leaves?: Yes, they are often used like spinach in stir-fries.

Where the name comes from

The name Psophocarpus comes from Greek words meaning noisy fruit, referring to the sound the pods make when they dry and split.

Good to know

The pods have four distinct wings running down their length.
It is a nitrogen-fixing legume that improves soil health.
The tubers are rich in protein compared to other root vegetables.
It thrives in hot, humid climates where other beans struggle.

Keep your winged bean growing

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.