There is no one true answer for this. Instead, people use both real or fake depending on their budget and convenience. People who are allergic to real flowers always use faux flowers for bouquets. Another reason to do so is to save money. There are faux flowers that look like the real ones such that nobody can possibly tell that they are fake without a close examination. Fake flowers don’t go bad as well. Therefore, if you want to prepare a bouquet for an event many days in advance, your only option is to use fake flowers.