The Challenge of Shipping Fresh Flowers
Long-distance shipping presents a significant challenge for florists and wholesalers. Fresh flowers are living, breathing, and highly perishable products that continue their biological processes even after being cut. The primary goals during transit are to minimize moisture loss, prevent physical damage, and slow down respiration and ethylene production. Success depends on a meticulous process that begins long before the box is sealed.
Key Stages in Preparation
The preparation of flowers for shipping is a multi-step protocol. Each stage is designed to address a specific threat to the flowers' vitality during their journey.
1. Post-Harvest Conditioning and Hydration
This is the most critical step. Flowers must be fully hydrated before shipping. Upon receipt from the grower or after processing, stems are recut under water to prevent air embolisms from blocking the vascular system. They are then placed in a hydration solution-typically a clean, pH-balanced water with a professional floral food. This solution provides carbohydrates for energy and biocides to inhibit bacterial growth. Flowers are allowed to drink in a cool environment for several hours, or ideally overnight, to achieve maximum turgidity.
2. Temperature Management and Cooling
Lowering the temperature of flowers is the single most effective way to extend their vase life. It dramatically slows respiration, moisture loss, and the effects of ethylene gas. Flowers are moved into a cold room, usually held between 34°F and 38°F (1°-3°C), after conditioning. This process, known as "dry cooling," removes the field heat and prepares the flowers for a cold chain. For long shipments, flowers are often packed while cold, and the boxes are designed to maintain this low temperature for a period.
3. Protective Packing Mechanics
Packing is an art that balances protection with airflow. Common materials and methods include:
- Bunched and Sleeved: Flowers are grouped by type, their heads often protected by plastic or paper sleeves to prevent bruising.
- Corrugated Boxes: Shipping boxes are wax-coated or insulated to resist moisture and temperature fluctuations.
- Internal Stability: Bunches are secured with rubber bands or ties and often packed tightly with paper or plastic inserts to prevent shifting.
- Temperature Control: For long hauls, gel ice packs or refrigerated (reefer) trucks are used. It is crucial that ice packs do not directly contact the flowers to avoid freeze damage.
4. The Importance of the Cold Chain
The concept of a "cold chain" is vital in floral logistics. It refers to the uninterrupted series of refrigerated production, storage, and distribution activities. The goal is to keep the flowers within their ideal temperature range from the moment they are packed until they are received by the final florist. Breaks in this chain, where flowers sit on a warm dock or in a non-climate-controlled truck, can cause condensation, promote botrytis (gray mold), and drastically reduce longevity.
What Receiving Florists Should Do
The preparation does not end with the shipper. The receiving florist plays a crucial role in the final outcome. Upon delivery, boxes should be opened immediately in a cool area. Flowers will often be thirsty and cold. Best practices include:
- Inspecting the shipment for damage or signs of disease.
- Allowing flowers to acclimate to the shop temperature for 15-30 minutes before processing to prevent condensation.
- Recutting stems under water and placing them in a fresh floral food solution.
- Allowing a full rehydration period in a cooler before designing or selling.
By understanding and executing these stages, florists can ensure that flowers shipped across the country or the world arrive with the quality and longevity that both professionals and customers expect. It is a testament to the sophisticated behind-the-scenes work that makes a global flower industry possible.