Which environmental factor does NOT negatively affect the longevity of a corsage?

The longevity of a corsage is influenced significantly by environmental factors, and rainfall is the one that does not negatively affect its lifespan. Corsages are often made from fresh flowers that can benefit from moisture in the environment. Unlike heat and sunlight, which can lead to wilting and drying out of the flowers, or low humidity, which can also dehydrate the blooms, rainfall provides hydration that can actually help maintain the freshness of the flowers in a corsage.

When flowers are adequately hydrated, they can better preserve their vibrancy and structural integrity. Thus, while excess moisture might lead to issues like mold or rot if not properly managed, light rainfall or humidity can help keep a corsage looking fresh longer, particularly if the flowers are in good condition to begin with and if the arrangement is designed to drain excess water. This understanding is crucial for anyone preparing corsages, as it highlights the importance of managing their environment for optimal longevity.