What are ideal storage conditions for potatoes?
Written by
Benjamin Miller
Reviewed by
Prof. Martin Thorne, Ph.D.By maintaining controlled environments, you can store your potato harvest for months. You want to find the settings where they will not sprout, rot, or produce toxic greening. I have stored potatoes over the winter using these practices. Mismanaging storage leads to disappointment and waste in your gardening.
Temperature Control
- Optimal range: 40-45°F (4-7°C) - prevents starch conversion
- Refrigerator danger: Below 40°F causes sweet flavor defects
- Summer storage: Use basements or root cellars instead of kitchens
- Monitoring: Check weekly with calibrated thermometer
Moisture Management
- Humidity level: 90-95% prevents shriveling
- Achievement method: Place water pans near storage containers
- Ventilation need: Airflow stops condensation and mold
- Sign of failure: Soft wrinkles on tuber surfaces
Darkness doesn't totally prevent toxic greening, but it does slow down the process. Solanine develops quickly when exposed to light. Use opaque containers, such as burlap sacks or wooden crates, to conceal the contents. Never place in bright windows or under light. I am also lining the storage space with black plastic to eliminate any light penetration.
Check stored potatoes every two weeks. Dispose of any sprouted or softening tubers right away. Allow air to circulate in the potato storage container with pallets. I lost 30% of one crop because I was lazy and didn't check it monthly. Good storage will keep potatoes fresh for 6-9 months.
Read the full article: When to Harvest Potatoes: 6 Key Signs
