You don't plant multiple potatoes in each hole - one seed potato (or seed piece) goes in each planting position, spaced 20-30 cm apart within the row for standard ware crops.
According to university extension services and ICAR-CPRI standards, the planting approach focuses on individual seed placement at specific intervals rather than multiple tubers per hole. Penn State Extension recommends 7-12 inches (18-30 cm) between seed pieces depending on your target tuber size, while ICAR-CPRI's Indian standard uses 20 cm spacing within 60 cm rows.
The spacing varies by production goal:
- Ware crops: 20-30 cm between seed pieces (40,000-55,000 plants/ha)
- Seed production: 15-20 cm spacing for denser planting (55,000-85,000 plants/ha)
- Fresh market/new potatoes: 25-30 cm spacing (55,000-70,000 plants/ha)
Each seed potato or cut seed piece should be planted 8-15 cm deep (deeper in dry conditions, shallower in wet), with planting depth adjusted based on soil moisture conditions according to FAO and CIP guidelines.