How to Grow Yam
Dioscorea spp.
Yams are tropical climbing vines producing large starchy tubers underground. Plant tuber sections into warm, loose, well-drained soil once temperatures are consistently above 20C. Provide sturdy stakes or trellis as vines grow vigorously to 2-3 metres. Keep soil consistently moist but not waterlogged during the long growing season of 8-11 months. Feed monthly with high-potash fertilizer once vines are established. Harvest when foliage dies back naturally, digging carefully to avoid damaging tubers. Cure in shade for several days before storing in a warm, dry, well-ventilated place above 15C.
When to Start
Plant directly outdoors once soil temperature reaches 20°C. No seed starting needed — grow from bulbs, tubers, or sets.
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Growth Stages
Approximate days from start
Care Essentials
- Apply balanced fertilizer at planting, then high-potash feed monthly once vines are established. Avoid excess nitrogen which promotes vine growth over tubers.
- True yam (Dioscorea spp.) is a tropical climbing vine, not to be confused with sweet potato. Requires 8-11 months of warm weather and vertical support for vines that can reach 2-3 metres. Staple food in West Africa, Caribbean, and Pacific Islands.
Growing Conditions
- Min. soil temperature
- 20°C+
- Germination temperature
- 25–35°C
- Direct sow
- —
- First harvest
- —
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Spacing & Planting
| Plant spacing | 100 cm |
| Row spacing | 120 cm |
| Sow depth | 10 cm |
| Mature height | 250 cm |
| Mature spread | 80 cm |
Plant tuber sections or vine cuttings into warm, loose soil. Needs vertical support for climbing vines.
Growing Conditions
| Min. soil temperature | 20°C |
| Germination temperature | 25–35°C |
| Base growth temperature | 15°C |
| Min. daylength to start | 11h |
| Photoperiod sensitivity | day neutral |
Frequently Asked Questions
- How far apart should I plant Yam?
- Plant Yam 100cm apart with 120cm between rows.
- When can I harvest Yam?
- Yam is ready to harvest approximately 270 days after transplanting.
- Is Yam frost hardy?
- Yam is classified as Tender.
