There are several tried and true options for preserving flowers after prom is over. The easiest way to preserve flowers from prom is by drying them out. Just wrap a rubberband around the stems of the flowers and hang them upside down for a few days to dry out. Keep in mind that dried flowers are fragile, so display them carefully to avoid crumbling. Another popular method for preserving prom flowers is to spray them with an aerosol hairspray to keep them from wilting. You can also purchase a kit designed for preserving your flowers in gel, or you can press the flowers between the pages of a thick book, wait a few weeks until dry, and ta-da! Perfectly pressed and preserved prom memories.