LA Retail Florist Practice Exam 2026 – Comprehensive Prep

The STS (silver thiosulfate) pre-treatment is effective in minimizing ethylene damage to flowers because it acts as an ethylene inhibitor. Ethylene is a natural plant hormone that can accelerate senescence and result in premature wilting and decay of flowers. By using STS, florists can enhance the longevity of cut flowers, as it competes with ethylene at binding sites, thus reducing its impact on the flowers and delaying their aging process.

This treatment is particularly beneficial for flowers that are sensitive to ethylene, especially during transportation and storage, where high ethylene levels from other ripening fruits and plants could lead to damage. By preventing or reducing the production of ethylene responses, STS allows flowers to remain fresher and more appealing for a longer time, thereby improving their marketability.

Other methods such as heating, excessive watering, and direct sunlight exposure do not specifically address the ethylene sensitivity and can lead to other forms of stress or damage to the flowers.