Which of the following is a common method for prolonging the life of cut flowers?

The recommended practice for prolonging the life of cut flowers is to change the water regularly and add preservatives. This method is effective because fresh water provides essential hydration, while preservatives contain nutrients and ingredients that inhibit microbial growth, helping to prevent decay and extending the time the flowers remain vibrant. Maintaining clean water and adding preservatives ensures that the flowers receive the nutrients they need while minimizing harmful bacteria that can develop in stagnant water.

Using hot water in the vase may initially help dissolve some air bubbles trapped in the stems, but it can also cause damage to delicate blooms, leading to a shorter lifespan. Leaving flowers in direct sunlight can accelerate wilting and decay, as the heat can cause the flowers to absorb excessive moisture leading to stress. Removing all leaves from the stems can result in a loss of photosynthetic ability needed to sustain the flowers, ultimately reducing their longevity. Therefore, regularly changing the water and using preservatives is a scientifically supported, effective method for maintaining the freshness of cut flowers.