A Complete Groundnut Farming Manual

Groundnuts. Whether roasted by the roadside, crushed into peanut butter, or cooked in stews; are a Kenyan favorite. Beyond our kitchens, they are rich in protein, oils, and vitamins, making them a healthy crop in demand.

For farmers, groundnuts are more than food. They’re a cash crop, a soil improver (they fix nitrogen like beans), and a way to diversify income. In counties like Siaya, Busia, Homa Bay, Kitui, and parts of Meru, farmers are already making steady money from this humble nut.

Climate and Soil Needs

Groundnuts love warm climates with moderate rainfall. They need 100–150 days of frost-free weather to mature. Rainfall should be well spread—too much at once leads to rotting, too little stunts the pods.

Ideal soils are sandy loam, well-drained, with pH 5.5–7. Heavy clay soils don’t work because the nuts grow underground and need loose soil to expand.

Tip: If your soil compacts easily, loosen it with sand or organic matter before planting.

Selecting Varieties

In Kenya, common groundnut varieties include:

• Red Valencia: Fast-maturing (3 months), small red kernels, popular in Western Kenya.
• Homa Bay Red: Grown around Lake Victoria, hardy, and widely accepted in local markets.
• ICGV-SM 12991 & ICGV-SM 99568: Improved varieties from ICRISAT, higher yielding and disease resistant.
• Sourcing Seeds:
  • Certified Nurseries: Organicfarm or Seedfarm, +254712075915, info@seedfarm.co.ke.

Land Preparation and Planting

Groundnuts need a fine seedbed for uniform germination. Plough and harrow until the soil is loose.

Planting guide:

• Spacing: 30–45 cm between rows, 15 cm between plants.
• Depth: 3–5 cm.
• Seed rate: 20–25 kg per acre.
• Season: Plant at the onset of rains for best germination.

Do not plant groundnuts continuously on the same land—rotate with maize, sorghum, or cassava to avoid diseases.

Crop Management

• Weeding: Weed twice—at 2 weeks and 5 weeks after planting. Avoid deep weeding later, since the pods develop underground.
• Earthing up: At 6–7 weeks, gently heap soil around the base of plants. This helps pods form better.
• Fertilizer: Groundnuts generally don’t need much fertilizer. A handful of well-rotted manure per hole is enough. Avoid nitrogen fertilizers—they cause too much leafy growth.
• Pests & Diseases: Watch out for aphids, rosette virus, and leaf spots. Neem solution or recommended fungicides help.

Harvesting

Groundnuts are ready when leaves start yellowing and pods are firm with brown inner shells. For most varieties, this is 90–120 days after planting.

Pull up the plants gently, shake off soil, and dry them upside down in the sun for a few days.

Important: Dry pods to 8–10% moisture before storage. Moist nuts get aflatoxin, which makes them unsafe and unsellable.

Yields and Returns

With good care, an acre gives 800–1,200 kg of unshelled groundnuts. Shelled nuts fetch higher prices.

• Farmgate prices: KSh 120–160 per kg (unshelled).
• Urban markets: KSh 250–300 per kg (shelled, clean nuts).
• Peanut butter processors may pay even more for bulk, clean supplies.

So an acre can easily gross KSh 100,000–200,000, depending on management and market access.

Marketing Opportunities

Groundnuts have a ready market almost everywhere in Kenya:

• Local open-air markets (especially in Western and Eastern Kenya).
• Urban supermarkets and health shops.
• Peanut butter processors in Nairobi and Kisumu.
• Export potential—Uganda and Rwanda buy in bulk for processing.

Value addition is key: peanut butter, roasted nuts, or even groundnut flour fetch double or triple the raw nut price.

Challenges

• Aflatoxin risk: Poor drying and storage lead to losses. Always ensure proper moisture control.
• Seed quality: Many farmers recycle poor-quality seed, lowering yields.
• Market fluctuations: Prices drop when everyone harvests at the same time. Drying and storing until off-season pays better.
• Birds & pests: Groundnuts are loved by everyone—including pests. Constant monitoring is needed.

Practical Farmer Tips

• Plant early with the rains to avoid drought stress.
• Use gunny bags and raised platforms for storage to prevent aflatoxin.
• Intercrop with short-season crops like beans to maximize land use.
• Work in groups to bulk groundnuts for better bargaining power with buyers.

Groundnuts may be small, but they can make a big difference in a farmer’s pocket. They improve soil, provide nutrition, and open doors for agribusiness opportunities. With proper care, from planting to post-harvest handling, a farmer can turn a single acre into a steady source of income.

Groundnuts are not just a crop—they’re a smart, reliable investment for any Kenyan farmer.