China cold storage solution provider
Grapes are one of the most popular summer fruits, known for their juicy texture and sweet flavor. However, at room temperature, grapes cannot be stored for long—they quickly lose moisture, fall off the stem, and rot. To solve this problem, most grape plantations and distributors rely on grape cold storage facilities, especially controlled atmosphere (CA) cold rooms, which are considered the most effective way to extend grape shelf life while maintaining freshness and water content.
So, how long can grapes be stored in cold storage? What are the best preservation methods? Let’s explore the key techniques.
✅ Grape Cold Storage Process
The general procedure for grape preservation in cold rooms includes:
Selecting storage-resistant varieties → Harvesting → Sorting → Packaging → Pre-cooling → Cold storage entry → Environmental control → Storage maintenance → End of storage
✅ Key Parameters for Grape Cold Storage
Based on years of cold chain preservation experience, here are the recommended conditions for grapes:
- Temperature: 0℃ to 1℃ (constant temperature, avoid fluctuations)
- Relative Humidity: 90%–95% (to prevent dehydration and shriveling)
- Oxygen Concentration: 3%–5%
- Carbon Dioxide Concentration: 3%
⚠️ Low humidity increases the risk of shriveling and fruit drop, while excessive humidity encourages fungal growth and decay. Therefore, a balanced storage environment with high humidity and proper air circulation is essential.
With these conditions, grapes can be preserved in CA cold storage for up to 5–6 months, with a preservation success rate of over 95%.
👉 Learn more about CA cold storage technology and how it helps extend fruit shelf life.
✅ Cold Storage Precautions for Grapes
- Disinfection before storage: Use sulfur fumigation (20g sulfur per cubic meter, sealed for 24h, then ventilated).
- Pre-cooling is essential: Grapes must be cooled quickly after harvest to extend freshness.
- Proper stacking: Avoid overcrowding and compression to prevent fruit damage and loss.