Sweet Potatoes (Mahon Yam)
root
- 2026 · Bed B
- Spacing
- 12 in(1 / sqft)
- Trellis
- no
- Transplant
- May 13(+4 w)
- Harvest
- ~14–18 weeks from sowing
- Water
- 1-2 per week
- Lifecycle
- annual
- Seed source
- Johnny's Selected Seeds
Tropical native — wait until soil hits 60-70°F (typically 4 weeks past last frost in Zone 7) before planting slips 3-4 in deep. Black plastic mulch helps warm the bed. Harvest before first fall frost; cure at 80-90°F for a week to sweeten.