Dried & preserved materials care & lifespan: 

There is no expiration date for flowers that have been preserved. While many claim they will last indefinitely, their appearance actually depends on environmental conditions. The higher the humidity of the environment, the shorter the lifespan. Preserved flowers have a general shelf life of 1-3 years, but they may last much longer (they will however fade over time.)

For best results handle with care (Dried & preserved flowers & foliage are delicate and can easily be crushed).
Keep out of direct sunlight, away from air conditioning or heating ducts, windy or humid conditions.