Can I store potatoes in a cold garage?

You can potentially store potatoes in a cold garage, but success depends on several critical factors that require careful management.

Temperature Requirements by Use

According to USDA and FAO data, different potato uses require specific storage temperatures: fresh eating potatoes need 3-5°C, while processing potatoes require 6-12°C (chip potatoes need 8-12°C to prevent cold sweetening that causes dark, bitter frying and acrylamide formation). The challenge with garage storage is that most garages experience temperature fluctuations that could drop below 6°C, triggering the conversion of starch to reducing sugars.

Garage Storage Considerations

Your garage could work similarly to naturally ventilated storage systems used in temperate climates. The USDA notes that naturally ventilated storage relies on outdoor air and works in regions like Northern Europe, Canada, and Northeastern US with reliable cold winters. However, garages typically lack the controlled ventilation systems that commercial operations use — you'd need consistent 90-95% relative humidity and protection from light to prevent greening.

Practical Limitations

The biggest risks are temperature swings (garages often freeze in winter, which destroys potato cell structure) and humidity control. Commercial naturally ventilated storage costs USD 80-150 per tonne capacity with specialized ventilation systems. Your garage likely lacks the air circulation needed to prevent condensation and rot, and may expose potatoes to light, causing solanine production and greening.

For best results, use insulated containers, monitor temperature closely, and only attempt this in climates with stable winter temperatures above freezing but below 10°C.