Photo by Melody

PlantFiles: Winged Bean, Goa bean, Princess Bean
Psophocarpus tetragonolobus

Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Psophocarpus (so-fo-KAR-pus) (Info)
Species: tetragonolobus (tet-ra-gon-uh-LOW-bus) (Info)

2 vendors have this plant for sale.

6 members have or want this plant for trade.

Edible Fruits and Nuts
Vines and Climbers

Unknown - Tell us

Unknown - Tell us

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Light Blue

Bloom Time:
Late Summer/Early Fall


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow after last frost
Scarify seed before sowing

Seed Collecting:
Unknown - Tell us

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to view:

By eje
Thumbnail #1 of Psophocarpus tetragonolobus by eje

By jnana
Thumbnail #2 of Psophocarpus tetragonolobus by jnana

By AnitTina
Thumbnail #3 of Psophocarpus tetragonolobus by AnitTina

By AnitTina
Thumbnail #4 of Psophocarpus tetragonolobus by AnitTina


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral AnitTina On May 21, 2011, AnitTina from Eustis, FL (Zone 9a) wrote:

I managed to get only 2 growing out of a pack of seeds I really worked with them but they are not doing well in central fl the plants are still very tiny one of them made a beautiful blue bloom today they seem healthy but don't seem to be getting larger

Neutral smiln32 On Nov 8, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

This plant can probably only be grown in our zones 9-11, if even in zone 9. The reason is that it requires a great deal of light. Before the pods are completely ripened, they can be eaten fresh or cooked like snap beans. Every part of the plant can be eaten, though, including the roots, which are eaten like potatoes.


This plant has been said to grow in the following regions:

Hollywood, Florida
North Fort Myers, Florida

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