Njahi, also known as black beans or Dolichos lablab, is gaining popularity among farmers across Kenya. This drought-resistant crop is rich in protein, iron, potassium, folate, and magnesium.
Njahi is mainly grown in Central, Eastern, and parts of Western Kenya, where farmers value it for its edible beans and leaves.
The leaves are also used as livestock feed. Thanks to its nutritional value and market demand, Njahi offers a great opportunity for small-scale farmers looking for both food security and income.
Njahi Farming In Kenya From Soil To Harvest
Njahi farming in Kenya is simple and rewarding when done right. From choosing the right variety to managing pests, farmers can enjoy a successful harvest by following basic farming steps.
Njahi Varieties Grown in Kenya
Kenya has several Njahi varieties suited for different regions. The most common ones include:
- KAT DL 1, KAT DL 2, and KAT DL 3 – These are improved varieties from KALRO (Kenya Agricultural and Livestock Research Organization). They mature faster and are high-yielding.
- Rongai – A traditional variety known for its resistance to drought.
- DL 1002 and DL 1009 – These are suitable for regions with medium rainfall and mature within a short period.
When selecting a variety, consider your region’s climate, rainfall, and soil conditions to ensure you get the best yields.
Njahi Planting and Management in Kenya
Njahi grows best in well-drained sandy-loamy soils with a pH of 5.5 to 6.5. It thrives in areas with 400 to 750 mm of rainfall and temperatures between 18°C and 28°C. The ideal altitude for growing Njahi ranges from 500 to 1800 metres above sea level.
Most farmers plant Njahi directly in the field, though you can also start seedlings in a nursery and transplant them later. The best time to plant is at the start of the rainy season. Prepare the land by tilling and incorporating organic manure to enrich the soil.
You may also apply about 30kg of DAP fertiliser per acre at planting. Spacing should be 30cm between plants and 45cm between rows to allow enough room for growth and air circulation.
Keep your field weed-free, especially in the early stages, to reduce competition for water and nutrients. Use a hoe or hand-pulling to control weeds.
Managing Pests and Diseases
Njahi, like other legumes, is vulnerable to various pests and diseases. The common ones include:
Diseases
- Stem rot – Causes plants to wilt and die.
- Anthracnose – Appears as dark spots on leaves and stems.
- Powdery mildew – Looks like a white powder on leaves.
- Bacterial leaf spot – Causes yellowing and spots on the leaves.
Pests
- Nematodes (M. incognita and Meloidogyne hapla) – These attack the roots, stunting growth.
To manage these problems:
- Practice crop rotation.
- Remove and burn infected plants.
- Use certified seeds.
- Apply appropriate insecticides or fungicides when needed.
- Keep the field clean to reduce pest breeding grounds.
Njahi Harvesting and Market Prices
Njahi takes between 3 to 5 months to mature, depending on the variety and weather conditions. You should harvest when the pods are dry and begin to turn brown. Pick them carefully to avoid breaking the pods and spilling the seeds.
After harvesting, dry the pods further before shelling. Proper drying reduces the risk of mould and improves storage life.
Njahi fetches higher prices than common beans due to its rich nutrients and low supply. In most local markets, a 90kg bag of Njahi sells between Kshs 5,000 and 7,000. Prices may go even higher during off-seasons or when sold to international buyers.
Supermarkets, green groceries, cereal stores, and restaurants are reliable local buyers. You can also target health-conscious consumers and export markets if you grow in bulk and meet quality standards.
Why Njahi Farming In Kenya is a Smart Agribusiness
Njahi farming is not only affordable but also sustainable. It improves soil fertility through nitrogen fixation, making it a good choice for crop rotation. With minimal inputs and care, Njahi offers a high return on investment.
Moreover, Njahi’s health benefits continue to push demand in urban markets. Consumers value it for its ability to boost blood health, aid digestion, and provide energy, making it a staple in many households.
For farmers looking to diversify or shift to resilient crops, Njahi is an ideal option. It survives in low rainfall areas, requires minimal pest control, and has an expanding market.
