What is the purpose of the cold chain after harvesting flowers?

• A. Extends the life of cut flowers after harvest so they stay looking fresh
• B. Improves fragrance
• C. Changes color
• D. Increases blooming speed

Answer: (A)

Keeping flowers in a cold chain after harvest slows their metabolism and reduces water loss, which dramatically extends their vase life so they stay looking fresh longer. Cut flowers can’t take up water from soil, so lowering the temperature slows respiration (the use of stored sugars) and slows aging processes that lead to wilting, browning, and loss of firmness. Cooler temperatures also reduce ethylene production and the plant’s response to it, delaying senescence. As a result, petals stay firmer, colors stay brighter, and the arrangement remains appealing through handling, packing, shipping, and display. Without cooling, flowers wilt faster and deteriorate sooner. The other options aren’t the purpose of the cold chain—fragrance, color change, or speeding blooming are not improved by keeping things cold; in fact, cold tends to slow those processes.