Vegetable cold storage temperature and pre-cooling requirements
Vegetables cover a very wide range of storage conditions, from near-freezing leafy produce to warm-stored crops that suffer chilling injury. Getting the zoning right is the single largest determinant of both losses and refrigeration cost.
| Condition | Indicative temperature | Humidity | Engineering note |
|---|---|---|---|
| Leafy greens and brassicas | 0 to +2 °C | 95–98 % RH | Very high humidity limits wilting. |
| Root vegetables (general) | 0 to +4 °C | 90–95 % RH | Ventilation and curing requirements vary by crop. |
| Chilling-sensitive vegetables (e.g. tomato, cucumber, pepper) | +7 to +13 °C | 85–95 % RH | Cold storage below threshold causes damage. |
| Pre-cooling duty | Design case, not a holding setpoint | n/a | Vacuum, hydro or forced-air cooling depending on crop. |
Values are indicative planning ranges used for early-stage refrigeration sizing and procurement. They do not replace product-specific food-safety, pharmaceutical, regulatory or customer requirements, which take precedence in every case. Confirm final conditions with your quality function and a qualified refrigeration engineer.
Refrigeration engineering considerations
Pre-cooling method
Vacuum cooling suits leafy crops, hydro-cooling suits dense produce, forced-air suits packed product. The choice drives the plant, not just the room.
Humidity control
Leafy produce requires very high relative humidity; coil selection and defrost strategy must reflect that.
Ethylene separation
Ethylene producers should not share a room with sensitive crops.
Mixed-commodity zoning
Multi-crop packhouses need multiple temperature zones rather than one compromise setpoint.
From temperature to system requirement
- 1. Confirm the storage condition for your product and market.
- 2. Size the room — cold room size calculator.
- 3. Calculate the refrigeration duty — refrigeration load calculator.
- 4. Check operating cost — electricity cost calculator.
- 5. Send one brief to vetted suppliers — build an RFQ.
A senior cold-chain specialist stays with your project from first brief to commissioning.
Related
Frequently asked
One brief, comparable quotes from vetted cold storage suppliers and EPCs.