Increasing Potato Yields: Soil, Hilling, and Fertilizer

Key Practices for a Better Potato Harvest

Low potato yields often stem from poor soil structure, insufficient hilling, or incorrect fertilization.

Soil Preparation

• Tilth: Soil should be loose, crumbly, and well‑drained—avoid heavy clay or pure sand.
• Deep tillage: Loosen soil to 12–18 inches to allow tuber expansion.
• Organic matter: Incorporate compost or well‑rotted manure before planting.

Planting and Hilling

1. Cut seed potatoes into pieces with at least one “eye” each; let cut surfaces dry 1–2 days.
2. Plant in deep furrows (4–6 inches), 12 inches apart, rows 30–36 inches apart.
3. As plants grow, hill soil (or straw) around stems every 2–3 weeks, leaving top leaves exposed. This creates more tuber‑forming zone.

Fertilization

• Use a fertilizer low in nitrogen, high in phosphorus and potassium (e.g., 6‑24‑24 or 8‑24‑24).
• Avoid fresh manure or high‑N fertilizers—they promote foliage over tubers.
• Side‑dress with composted manure at hilling for sustained nutrition.

Additional Tips

• Rotate crops; avoid planting potatoes where tomatoes, peppers, or eggplants grew recently.
• Water consistently, especially during tuber bulking (after flowering).
• Harvest new potatoes early; for storage, wait until vines die back.

With good soil, diligent hilling, and the right fertilizer, your potato yields should improve significantly.