Sweet Potato
Ipomoea batatas
About Sweet Potato
Sweet potato is the seventh most important food crop globally and the second most important root crop in sub-Saharan Africa after cassava. It is exceptionally nutritious — orange-fleshed varieties (OFSP) are the most affordable source of beta-carotene (vitamin A) available to African farming families. Sweet potato is fast-growing (3-5 months), drought-tolerant, and grows on marginal soils, making it a critical food security crop. China produces 55% of the world's sweet potato. In Africa, sweet potato is a women's crop — women control its production, processing, and sale. CIP and HarvestPlus have promoted OFSP varieties across Africa to combat vitamin A deficiency in children.
Growing Conditions
Full sun — 6+ hours daily
500-1,000 mm per crop. Tolerates drought better than most root crops. Excess water causes root cracking.
Light, well-drained sandy loam. pH 5.5-6.5. Heavy clay produces rough, misshapen roots.
Optimal 24-30°C. Requires warm soil (>18°C) for root initiation. No frost tolerance.
Moderate. Very high humidity promotes SPVD and vine rot.
Warm season — 3-5 months from planting to harvest. Plant at onset of rainy season.
Step-by-Step Growing Tips
Use virus-free vine cuttings (30 cm tip cuttings from healthy plants)
Plant on ridges or mounds 30 cm high for good root development
Space at 90 × 30 cm on ridges
Apply moderate phosphorus and potassium — avoid excess nitrogen
Harvest when roots reach desired size (check by carefully digging near base)
Cure roots at 30°C and 85% humidity for 5-7 days to heal harvest wounds
Disease Risks to Watch
All diseases →Companion Planting
✅ Good Companions
Growing Zones
Frequently Asked Questions
When is the best time to plant Sweet Potato?
Warm season — 3-5 months from planting to harvest. Plant at onset of rainy season.
What soil does Sweet Potato need?
Light, well-drained sandy loam. pH 5.5-6.5. Heavy clay produces rough, misshapen roots.
How much water does Sweet Potato need?
500-1,000 mm per crop. Tolerates drought better than most root crops. Excess water causes root cracking.
What are the most common diseases affecting Sweet Potato?
The most common diseases are: sweet potato virus disease. Monitor regularly and practice crop rotation.
What plants grow well with Sweet Potato?
Good companions include: bean, maize. Avoid planting near no specific plants.
Growing Sweet Potato? Protect It.
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