Farmers in Kenya’s arid and semi-arid counties are increasingly turning to thorn melon, also known as kiwano or horned melon, as a reliable and profitable crop in the face of recurring droughts.
The fruit, known for its spiky orange skin and green jelly-like interior, is gaining popularity in counties such as Makueni, Machakos, Kajiado, and Tharaka Nithi, where traditional crops like maize and beans often fail due to water scarcity. In Nairobi markets, including City Market and major supermarkets, thorn melon retails at between KSh 50 and KSh 80 per fruit, translating to approximately KSh 100 to KSh 150 per kilogram for premium organic produce.
Agricultural experts note that the crop’s short maturity period has contributed to its growing adoption. Thorn melon takes between 80 and 110 days to mature, allowing farmers to harvest within about three months of planting. Under proper management, yields can reach 15 to 20 tonnes per acre, with potential earnings ranging from KSh 600,000 to KSh 1.2 million per season depending on market prices.
The crop is being promoted as a climate-resilient alternative due to its ability to withstand harsh conditions. With deep root systems and a thick outer skin that reduces moisture loss, thorn melon continues to produce even when other crops wither under extreme heat.
The best-performing regions for the crop remain the ASAL counties, although farmers in areas such as Naivasha and Laikipia have successfully cultivated it under irrigation, enabling year-round production. The plant adapts well to different soil types, provided there is good drainage.
Seed quality has emerged as a key factor in determining productivity and market value. Improved commercial varieties, available from certified seed companies, produce uniform fruits with better size, appearance, and juice content compared to traditional local varieties. These improved seeds cost approximately KSh 2,500 per kilogram, with about 500 grams sufficient to plant one acre, making it a relatively low-cost investment.
Agronomists emphasize the importance of proper soil fertility management to achieve high yields. Farmers are advised to incorporate organic manure during land preparation to improve soil structure and provide sustained nutrients throughout the growing period. Basal fertilizer application at planting supports early root development, while top dressing with nitrogen-based fertilizers enhances vegetative growth.
Potassium application is particularly critical during flowering and fruiting stages, as it improves fruit quality, enhances sweetness, and boosts the characteristic orange coloration that attracts buyers. Soil testing is also recommended to maintain optimal pH levels between 6.0 and 7.0, ensuring maximum nutrient availability.
As climate variability continues to challenge conventional farming, thorn melon is emerging as a viable option for farmers seeking both resilience and profitability in Kenya’s drylands.
By; Catherine Kamunyo
