Yellow Sweet Potato Farming in Nghe An | Vietnamese Agricultural Wisdom

Yellow Sweet Potato Farming in Nghe An | Vietnamese Agricultural Wisdom

Hello everyone,
Today, we’ll explore how to grow the famous yellow sweet potatoes from Nghe An province — a local specialty known for its sweet, nutty flavor, soft golden flesh, and thin skin. This variety is not only loved in its hometown but is also gaining popularity across Vietnam.

🥔 1. Introduction to Yellow Sweet Potatoes from Nghe An
Nghe An yellow sweet potatoes have pale purple vines, green leaves, and long, evenly shaped tubers. Their skin is light purple-brown, and the flesh is deep golden. When boiled, they become fluffy, naturally sweet, and aromatic. This variety grows well in sandy loam soil and hot, sunny climates typical of central Vietnam.

🌱 2. Soil Selection and Preparation
Ideal soil: sandy loam or light clay soil that is well-drained and fertile.

pH requirement: between 5.5 and 6.5.

Soil preparation: Plow 20–25 cm deep and make raised beds 30–35 cm high and 1–1.2 meters wide.

Base fertilizer: Mix 10–15 kg of lime and 500–700 kg of well-decomposed manure per 500 m² (or "sào") 7–10 days before planting.

🌿 3. Seedlings and Planting Method
Seedlings: Use healthy vine cuttings 25–30 cm long, free of pests or disease.

Planting density: About 3,500–4,000 cuttings per 500 m².

Spacing: Plant two rows per bed; row-to-row spacing: 50 cm, cutting-to-cutting spacing: 30 cm.

Planting technique: Insert the vine cutting at a 45-degree angle into the soil, burying two-thirds of the cutting. Press firmly to secure it.

💧 4. Care and Maintenance
Watering: Keep the soil moist for the first 3–5 days after planting. Later, only water during long dry periods.

Weeding and ridging: First weeding at day 15, second weeding and ridging at day 30–35. Remove excessive trailing vines to concentrate nutrients in the tubers.

Fertilizing:

First application: At day 15 – apply nitrogen and potassium.

Second application: At day 35–40 – add phosphorus and more potassium to promote tuber growth.

Avoid overusing nitrogen, which can cause lush vines and poor tuber formation.

🐛 5. Pest and Disease Control
Common pests: Leaf-eating worms and caterpillars. Use biological pesticides or handpick them.

Tuber borers: Keep tubers covered with soil to prevent damage.

Diseases: Wilting and root rot can be prevented by planting in raised beds and rotating crops.

⏳ 6. Harvesting
Harvest time: Around 100–110 days after planting.

Signs of maturity: Leaves begin to yellow, vines dry out, and tuber skins become smooth and shiny.

How to harvest: Gently dig around the roots to avoid damaging the tubers. Lift the entire cluster for sorting.

📦 7. Storage and Marketing
After harvesting, air-dry the sweet potatoes in the shade for 2–3 days to set the skin.

Store in a cool, dry, and ventilated place.

Nghe An yellow sweet potatoes are widely sold in local markets, supermarkets, and cities due to their rich flavor and natural sweetness.

✅ Conclusion
Growing yellow sweet potatoes from Nghe An is not only an effective agricultural model but also a way to preserve a valuable native crop. We hope this guide helps farmers and gardening enthusiasts grow high-quality, high-yield sweet potatoes that contribute to better income and rural development.

Thank you for watching and listening!

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