There is nothing better than a clear glass dome to protect the everlasting flowers as it prevents moisture and does not block us from enjoying the beautiful form of the flowers. Preserved rose flowers with glass dome seem to be elves enchanted by the magic of humans, and are the ones that become more colorful and last longer.
How long can eternal flowers be kept?
Depending on the environmental conditions, the amount of time that eternal flowers can be kept varies. In a very humid or sunny environment, they can be kept for a shorter period of time, but basically for 1-3 years; in a natural environment, they can be kept for 3-5 years, and if kept in a sealed environment, they can be kept for more than 10 years.
The above is the answer to the question why do you need a glass dome for eternal flowers, I hope it will help you .