Ethylene

"A naturally-occurring plant hormone (C2H4 gas) released by ripening fruit, decaying flowers, and aging produce that triggers ripening and senescence in nearby plants and flowers."

Why it matters

Ethylene is the silent killer of cut flower arrangements. A bowl of bananas on the same counter as a vase of lilies will accelerate the lily wilt by 30 to 50 percent. Fading flowers in a multi-flower arrangement also produce ethylene, which is why removing wilted blooms extends the life of healthy ones in the same vase.

Florists ship sensitive flowers (gerbera daisies, snapdragons, carnations) through cold chains explicitly designed to suppress ethylene production. Home buyers can replicate the effect by keeping flowers cool and physically separated from fruit.

Best practices

Never display fresh-cut flowers in the same room as ripening fruit, especially bananas, apples, pears, tomatoes, and avocados. Remove wilted flowers from arrangements promptly. If you must transport flowers next to fruit (in a grocery cart, in the trunk), bag the flowers separately to limit gas exposure.

Frequently asked

Can I see or smell ethylene?

No. Ethylene is colorless, odorless, and acts at concentrations far below any human sensory threshold. The flowers wilt; you don't notice why.