Potato Farming Guide for Nepal: Growing the Two-Season Staple Crop

Why Potato Is Nepal's Key Crop

Potato (Solanum tuberosum L.) is Nepal's leading food and cash crop — the most widely consumed staple after rice and wheat. Because it can be planted twice a year, it gives farmers a steady, repeatable income source. Since it grows well in both hill and Terai regions, farmers in nearly every district can grow it.

Botanical classification: Kingdom – Plantae, Family – Solanaceae, Genus – Solanum, Species – tuberosum

Ideal Climate and Soil

• Cool, temperate climate suits potato best; yields are strongest around 15-20°C
• Loamy, well-aerated soil with good drainage
• Soil pH of 5.5-6.5 gives the best results

Popular Varieties

Nepali farmers commonly grow varieties such as Khumal Seto, Khumal Rato, Jyoti, Super Chinsona, and Kunwari Pyaro. Check with your local agriculture knowledge center or seed supplier to choose a variety suited to your area's climate and market demand.

When to Plant

• Terai region: Kartik-Mangsir (October-November)
• Hill region: Falgun-Chaitra (February-March)

Many farmers also plant twice a year — a spring crop (planted Magh-Falgun, harvested Baisakh-Jestha) and an autumn crop (planted Bhadra-Ashwin, harvested Mangsir-Poush) — across both seasons.

Seed Rate and Selection

You'll need 1500-2500 kg of seed potatoes per hectare. Choose only disease-free, healthy, uniformly sized (30-50g) certified seed potatoes. Before planting, let seed potatoes sit in bright but indirect light to develop small sprouts (a process called greening) — this improves germination rate significantly.

Land Preparation and Planting Method

Plough the field deeply 2-3 times to loosen the soil, break up clods, clear weeds, and form raised beds (ridges). Work 8-10 quintals of farmyard manure per ropani into the soil. Plant seed potatoes 8-10cm deep, spacing rows 60-75cm apart and plants 20-25cm apart within the row.

Fertilizer Management (Per Hectare)

• Farmyard manure: 20-25 tons
• Urea: 150 kg
• DAP: 125 kg
• Potash: 100 kg

Apply half the fertilizer as a basal dose at planting, and the remaining half during earthing up.

Irrigation Management

• Water lightly right after planting
• Then irrigate on a regular 7-10 day cycle
• Never let water pool in the field — standing water causes tuber rot
• Keep water consistent during flowering and tuber formation, since a dry spell at this stage is what shrinks tuber size the most

Earthing Up

Do the first earthing up (hilling soil around the base of the plants) 20-25 days after planting, then a second round at 40-45 days. This protects developing tubers from sunlight, which otherwise turns them green, and supports stronger tuber development.

Disease Management

• Late blight: the most dangerous fungal disease, spreading fast in humid weather — treat with a mancozeb-based fungicide, alongside certified seed and proper spacing as prevention
• Early blight: treat with mancozeb or chlorothalonil

Always follow label dosage and safety instructions when applying any fungicide, or check with your local agrovet.

Pest Management

• Aphids: small insects that spread viral disease; neem oil spray controls them
• Cutworms and other pests: imidacloprid or another recommended insecticide works well
• Potato tuber moth: damages tubers even in storage; clean, dry storage conditions control it effectively

When to Harvest and Store

Potatoes are ready to harvest 90-110 days after planting, once the plant's leaves yellow and begin drying. After harvest, dry the tubers in shade for 2-3 days, then store in a dark, cool, well-ventilated space — exposure to light turns potatoes green and makes them toxic.

Expected Yield

With good management, you can expect 20-25 metric tons per hectare — roughly 10-13 quintals per ropani.

Key Takeaways

Disease-free seed, balanced fertilizer, consistent irrigation, and timely earthing up together make the biggest difference in final yield.

Market Opportunity

Since potato is used daily in nearly every Nepali kitchen, demand stays steady year-round. Selling directly to customers through FoodSansar provides a more stable income, less exposed to market swings than selling through middlemen.