How to install professional floral refrigeration or cold storage

To ensure your flowers stay fresh and your profit margins remain healthy, you must install a dedicated floral refrigeration system that maintains a steady temperature between 3°C and 7°C with high humidity. Investing in professional cold storage prevents blooms from opening too quickly and stops delicate stems from wilting, which is particularly vital during the warmer months in the UK. This setup is the difference between a bouquet that lasts three days and one that lasts ten.

Choosing the right setup for your space

Before you buy, you need to decide which type of cold storage suits your business model and the physical space available in your shop or workshop:

• Glass-Fronted Floral Coolers: These are perfect for retail environments. They allow customers to see your ready-made arrangements while keeping them in a controlled climate.
• Walk-in Cold Rooms: If you are focusing on weddings or large-scale events, a walk-in room offers the necessary space for buckets of bulk stems and large installations.
• Converted Spaces (CoolBot System): For a more budget-friendly approach, many UK florists use a "CoolBot" controller. This device allows you to use a standard powerful air conditioning unit to cool a well-insulated small room down to floral temperatures without freezing the air.

Pro Tip: Avoid using standard domestic fridges. They are designed to be bone-dry and usually sit below 3°C, which will dehydrate flowers and cause "fridge burn" on petals.

Key technical requirements

Floral refrigeration is more complex than food storage because flowers are living things that need a specific balance of air and moisture.

Feature	Requirement	Why it matters
Temperature	3°C to 7°C	Slows down the "breathing" of the flower to stop it from aging.
Humidity	80% to 90%	Prevents the air from pulling moisture out of the petals and leaves.
Airflow	Gentle/Indirect	Prevents "windburn" on delicate flowers like Sweet Peas or Hydrangeas.

Installation steps

1. Measure your maximum volume: Don't just measure for a quiet Tuesday; measure for your busiest periods like Mother's Day or Valentine's Day. Ensure you have enough floor space for buckets and vertical space for tall stems.
2. Check your power supply: Large commercial units may require a specific power outlet. Ensure your workshop's electrical circuit can handle the constant pull of a refrigeration compressor.
3. Plan for ventilation: Refrigeration units move heat from the inside of the box to the outside. If your cooler is in a small, unventilated room, the room will become incredibly hot, making the cooler work harder and increasing your electricity bills.
4. Level the unit: Use a spirit level to ensure the unit is perfectly flat. This ensures the drainage systems for condensation work correctly and prevents water from pooling at the bottom.

Best practices for cold storage

Once installed, how you use the space is just as important as the equipment itself. Always keep fruit (especially apples and bananas) away from your flowers. Fruit releases ethylene gas, which is a ripening agent that will cause your flowers to drop their petals and die prematurely. Additionally, ensure you clean the interior with a floral-safe disinfectant every week to prevent the buildup of mould or bacteria in the damp environment.