Tips for Using Dry Ice to Preserve Fresh Flowers and Produce
Dry ice is a great option when you need to preserve fresh flowers and produce.
When it comes to keeping flowers and produce fresh for longer periods, dry ice can be a powerful ally. Whether you’re a florist trying to extend the life of delicate blooms during transport or a farmer’s market vendor aiming to preserve the crispness of fruits and vegetables, using dry ice to preserve fresh flowers and produce is a smart, effective solution. But it’s important to handle this unique substance correctly to ensure safety and maximize its benefits. Here are some essential tips to help you do just that.
Why Use Dry Ice?
Dry ice is the solid form of carbon dioxide (CO₂) and maintains a temperature of -109.3°F (-78.5°C). Because it sublimates—turns directly from solid to gas—it leaves no watery residue like traditional ice. This makes it ideal for situations where excess moisture could damage delicate items, such as petals or leafy greens. The cooling properties of dry ice slow down enzymatic reactions and microbial growth, extending the freshness of both flowers and produce.
Tips for Using Dry Ice to Preserve Fresh Flowers and Produce
While dry ice is an amazing option when you need to preserve fresh flowers and produce, it’s important to know how to handle dry ice and what the best methods are for utilizing it safely.
Timing Matters
For best results, use dry ice for short-term preservation—up to 48 hours is ideal for transport or display. After that, switch to refrigeration for longer storage.
Use in a Well-Ventilated Area
Dry ice gives off carbon dioxide gas as it sublimates. In confined spaces, this can displace oxygen and create a risk of suffocation. Always handle and store dry ice in a well-ventilated area, and never in a sealed container that could rupture under pressure.
Wrap Dry Ice Properly
Never place dry ice directly in contact with flowers or produce. Direct contact can cause freezer burn and damage the delicate tissues. Instead, wrap the dry ice in several layers of newspaper or place it in a breathable container. Use barriers like cardboard or insulation between the dry ice and your items.
Use Insulated Containers
An insulated cooler is ideal for storing both dry ice and perishables. These containers slow the sublimation rate of the dry ice, keeping the internal temperature low for longer. For transporting floral arrangements or produce, a foam cooler or lined box works well.
Don’t Overpack
Overpacking with dry ice may cause the temperature to drop too low, potentially freezing items that should only be kept cool. Use the appropriate amount of dry ice for your load size—typically 5-10 pounds for every 24-hour period, depending on container size and insulation.
Monitor Temperature
To avoid accidentally freezing your produce or flowers, keep a thermometer inside your storage container. Monitor the internal temperature and adjust the amount of dry ice as needed. Most produce and flowers are best stored between 32°F and 50°F.
Wear Protective Gear
Always use gloves or tongs when handling dry ice. Contact with bare skin can cause severe frostbite due to its extreme cold. Safety goggles are also a good idea, especially when breaking dry ice into smaller pieces.
Bonus: Creative Uses for Flower Arrangements
In addition to preservation, dry ice can create dramatic effects in floral displays. By adding small amounts of warm water to a container holding dry ice, you can produce a misty fog that enhances visual appeal—perfect for events, weddings, or romantic gifts.
Dry Ice For All Your Needs
Dry Ice Corp is the largest regional supplier of dry ice and related products in the Northeastern United States. Our ice is fresh and delivered right to your doorstep. We are happy to help you determine the best way to ship your goods, whether you have a huge amount of cookies or a single pie, and help you select the perfect amount of dry ice for the job. Give us a call at (201) 767-3200 or contact us online for a quote. To connect with us online, be sure to follow us on Facebook, Pinterest, and Twitter.
