West African Okra

Abelmoschus caillei is native to West and Central Africa.

• Cultivated from Senegal eastward to Cameroon and into the Democratic Republic of Congo
• Likely originated as a cultivated hybrid in the West African Sahel-Savanna transition zone
• Adapted to humid tropical lowlands with annual rainfall of 1,000 to 2,000 mm
• Grows at elevations from sea level to approximately 800 meters
• The species may have arisen through hybridization and polyploidization during centuries of cultivation by West African farmers
• First described by the French botanist Auguste Chevalier in the early 20th century
• Remains under-researched compared to the more globally distributed common okra

A robust, erect, annual herb growing 1 to 3 meters tall.

Stems:
• Erect, woody at base, sparsely branched, covered with stiff hairs (hispid)
• Green to reddish-green, often with reddish streaks

Leaves:
• Broadly cordate to orbicular, up to 30 cm across, larger than those of common okra
• 3 to 7 lobes, margins coarsely toothed
• Petioles 10 to 30 cm long, often reddish
• Both surfaces sparsely hairy

Flowers:
• Large, showy, 6 to 10 cm in diameter
• Yellow petals with a deep crimson to maroon center (eye)
• Epicalyx segments 5 to 8, linear to lanceolate
• Solitary or in small clusters in upper leaf axils

Fruit (Pod):
• Elongated capsule, oblong-lanceolate, typically 15 to 30 cm long and 2 to 4 cm in diameter
• Green to dark green, prominently ribbed, covered with fine hairs
• When cut, exudes abundant mucilaginous sap

Abelmoschus caillei occupies a specific ecological niche in West African tropical agriculture and secondary growth.

Habitat:
• Native to humid tropical lowlands of West and Central Africa, from Senegal to Cameroon and into the Congo Basin
• Found at elevations from sea level to approximately 800 meters in the Sahel-Savanna transition zone
• Adapted to annual rainfall of 1,000 to 2,000 mm with a pronounced wet season
• Grows in well-drained, fertile soils but tolerates heavy clay and marginal soils
• USDA zones 10–12 (tropical, frost-sensitive)

Growth Habit:
• Erect, robust annual completing its life cycle in 90 to 150 days
• Full sun requirement — does not tolerate shade
• Warm-season crop requiring soil temperatures above 20°C for germination and growth
• More tolerant of high humidity and heavy rainfall than A. esculentus

Pollination:
• Large, showy yellow flowers with crimson centers are bee-pollinated, primarily by honeybees (Apis mellifera) and native solitary bees
• Flowers are self-compatible but benefit greatly from cross-pollination, which increases fruit set
• Flowers open in the morning and close by midday, concentrating pollinator visits

Ecological Role:
• Flowers provide nectar and pollen for diverse bee species in West African agricultural landscapes
• Deep taproot helps break up compacted soils and brings nutrients to the surface
• Commonly intercropped with maize, cassava, and peppers in traditional West African farming systems
• Leaves serve as fodder for livestock during the growing season
• Host plant for okra aphids (Aphis gossypii) and various flea beetle species

Invasive Status:
• Not invasive — confined to cultivation and nearby disturbed areas within its native tropical range
• Has not naturalized outside of Africa despite introduction to other tropical regions
• Limited global distribution compared to A. esculentus

Young okra pods are nutritious and provide several key nutrients.

• Per 100 g raw pods: approximately 33 kcal, 2 g protein, 0.1 g fat, 7 g carbohydrates
• Excellent source of dietary fiber (approximately 3.2 g per 100 g), both soluble and insoluble
• Rich in vitamin C (21 mg per 100 g), vitamin K, and folate
• Contains moderate amounts of vitamin A, thiamin, and vitamin B6
• Provides minerals including magnesium, potassium, calcium, and iron
• The mucilage contains soluble fiber that may help regulate blood sugar
• Seeds are rich in protein (approximately 20%) and edible oil

Propagated by seed directly sown in the field.

• Sow seeds 2 to 3 cm deep after all danger of frost has passed and soil temperature exceeds 20°C
• Spacing: 60 to 90 cm between plants, 90 to 120 cm between rows
• Germination in 7 to 14 days; soaking seeds in warm water overnight improves germination
• Prefers well-drained, fertile loam with pH 6.0 to 7.0
• Requires full sun and consistent moisture; intolerant of waterlogging
• Matures in approximately 60 to 90 days from sowing
• Pods should be harvested young and tender, every 2 to 3 days, to encourage continued production
• Responds well to organic amendments and moderate nitrogen fertilization

Culinary uses:
• Young pods are sliced and added to soups and stews as a thickening agent
• A defining ingredient in West African dishes such as okra soup, draw soup, and gumbo
• Pods can be fried, grilled, pickled, or roasted
• The mucilaginous texture is prized in West African cuisine as a natural sauce thickener
• Leaves are occasionally cooked as a potherb in some regions
• Seeds can be dried, ground, and used as a coffee substitute or protein supplement
• Dried pods are ground into powder for use as a soup thickener during the dry season