Yam bean (Pachyrhizus erosus)

Yam bean

Also known as: Turnip tree, Jicama

Native to Mexico and central South America, the yam bean (Pachyrhizus erosus) is a climbing vine with an edible, tuberous root. Archeologists have found it at sites in Peru dating back to 3000 BC. The root can be eaten raw or cooked in soups and stir-fries. The other parts of the plant, especially the seeds, are poisonous.

Scientific classification

Species

Yam bean (Pachyrhizus erosus)

Legumes, milkworts and allies

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Herb, Vine

Plant Type

Fall

Bloom Time

30 cm to 61 cm

Plant Height

6 m to 8 m

Spread

15 cm to 30 cm

Flower Size

Purple

Flower Color

Deciduous

Leaf type

Images of Yam bean

Distribution of Yam bean

Distribution Map

Yam bean originates from tropical regions of Central and South America. It has since been introduced to parts of Southeast Asia, the Pacific Islands, certain regions in Africa, and the Indian subcontinent. The plant is both naturalized and cultivated in many of these areas, expanding far beyond its native range.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Edges of deciduous forests and scrub vegetation.

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Yam bean

Every week

Water

Full sun

Sunlight

20 - 38 ℃

Ideal Temperature

Water: Yam bean thrives in high humidity and consistent moisture, requiring weekly watering to mimic its natural habitat. As an herbaceous plant, adjust watering practices based on seasonal rainfall patterns and local climates for optimal growth.

Fertilize: For yam bean, use high phosphorus fertilizers to enhance tuber formation and flowering. Apply a balanced 5-10-10 (NPK) fertilizer monthly during growth at 1 cup per square yard. Reduce during dormancy and monitor to avoid over-fertilization. Compost can provide slow-releasing nutrients.

Propagation: Yam bean is a tuberous-rooted vine propagated from quality seeds. Seeds should be pressed into well-draining soil and kept moist until germination. Once seedlings are established, they can be transplanted, ensuring space for root development. Regular watering and pest management are essential for healthy growth.

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