Solanum tuberosum
Sunlight
Full sun — 6-8 hours minimum. Short day length promotes tuberization in most varieties.
Water
500-700 mm per crop. Consistent moisture critical during tuber initiation and bulking. Avoid waterlogging (promotes late blight and bacterial wilt).
Soil
Loose, well-drained, slightly acidic loam or sandy loam. pH 5.0-6.5. Heavy clay causes misshapen tubers.
Temperature
Optimal 15-20°C for tuber growth. Tuberization inhibited above 25°C in most varieties. Night temperatures below 15°C promote tuber development.
Humidity
Moderate. High humidity combined with cool temperatures creates ideal late blight conditions.
Season
Cool season crop — 90-120 days to maturity. In tropics, grown at higher elevations (>1,500 m) or during cool dry season.
Updated February 2026
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Overview
The potato is the world's fourth most important food crop and the leading non-cereal food crop. It produces more food per unit of water and land than wheat or rice, making it critical for food security in land-scarce and water-limited regions. Potatoes are grown in over 150 countries, from sea level to 4,500 m in the Andes. They are rich in vitamin C, potassium, vitamin B6, and provide quality protein. In Africa, potato is the fastest-growing food crop, expanding rapidly in East African highlands (Kenya, Rwanda, Ethiopia) where conditions are ideal. The Irish Potato Famine (1845-1849), caused by late blight, killed over one million people and drove mass emigration — a stark reminder of the consequences of crop disease.
Plant Health
Potato is susceptible to 3 known diseases. Early detection is critical — use the CuraPlant app to scan leaves and get an instant AI diagnosis.
Potato Late Blight
Potato late blight (Phytophthora infestans) causes dark water-soaked lesions on leaves and stems, with white sporulation underneath. Tubers develop firm brown rot. Apply preventive mancozeb or chlorothalonil sprays from row closure, destroy infected foliage before harvest, use resistant varieties, and store only disease-free tubers.
Tomato Bacterial Wilt
Tomato bacterial wilt (Ralstonia solanacearum) causes sudden, rapid wilting of entire plants without yellowing. Cut stems placed in water ooze milky white bacterial streaming. There is no chemical cure. Use resistant varieties, crop rotation with non-solanaceous crops, grafting onto resistant rootstock, and strict sanitation. The bacterium persists in soil and irrigation water.
Tomato Fusarium Wilt
Tomato Fusarium wilt (Fusarium oxysporum f. sp. lycopersici) causes yellowing starting on one side of the plant, wilting, and brown vascular discoloration in stems. The fungus persists in soil for decades. Manage with resistant varieties carrying I, I-2, I-3 genes, grafting onto resistant rootstock, crop rotation, and raising soil pH to 6.5-7.0.
Cultivation Guide
Use certified disease-free seed potatoes — never plant grocery store potatoes
Cut seed tubers to 40-60 g pieces with at least 2 eyes, cure 2 days before planting
Hill soil around stems when plants are 20-30 cm tall to prevent tuber greening
Apply balanced fertilization — potassium is critical for tuber quality
Begin late blight fungicide program at row closure before symptoms appear
Destroy (desiccate) foliage 2 weeks before harvest to set tuber skin
Companion Planting
Strategic companion planting reduces pest pressure, improves pollination, and can significantly increase yields.
Climate & Regions
Active climate zones for Potato are highlighted below.
Tropical
Suitable
Subtropical
Suitable
Temperate
Suitable
Mediterranean
Not typical
Highland
Suitable
Arid / Semi-arid
Not typical
Specific Zones & Regions
Common Questions
Potato grows best during the cool season crop — 90-120 days to maturity. in tropics, grown at higher elevations (>1,500 m) or during cool dry season.. It requires optimal 15-20°c for tuber growth. tuberization inhibited above 25°c in most varieties. night temperatures below 15°c promote tuber development. and full sun — 6-8 hours minimum. short day length promotes tuberization in most varieties.. In tropical regions with consistent warmth, it can often be grown year-round with proper irrigation.
Potato is commonly affected by Potato Late Blight, Tomato Bacterial Wilt, Tomato Fusarium Wilt. Regular crop monitoring, good air circulation, avoiding overhead irrigation, and using disease-resistant varieties are the most effective prevention strategies.
Potato grows best in loose, well-drained, slightly acidic loam or sandy loam. ph 5.0-6.5. heavy clay causes misshapen tubers.. For irrigation: 500-700 mm per crop. consistent moisture critical during tuber initiation and bulking. avoid waterlogging (promotes late blight and bacterial wilt).. Maintaining proper soil moisture without waterlogging is critical — Potato is sensitive to both drought stress and root rot from excess water.
Potato grows well alongside horseradish, marigold, bean. These companions help repel pests, improve pollination, or provide ground cover. Avoid planting near tomato, sunflower, cucumber, which can inhibit growth or share susceptibility to the same pests and diseases.
CuraPlant
Scan any leaf with your phone and get an instant AI diagnosis, treatment guide, and prevention plan — even offline.
