Whether it's your wedding bouquet, just a special bouquet of flowers or even just a bouquet from your favourite florist, you will want to preserve it and make it last longer. When you preserve flowers, you may just drench them in hairspray and hang them upside down to dry for about a week.
But you will find that there is a specific product for preserving flowers and it's supposed to maintain the color and the shape and everything of your flowers as opposed to hair spraying them.
When you hairspray flowers, they usually get really dark and the petals would crack and break off very easily. So you may want to try out this new technique, as explained at https://www.secretflorists.com/production-method-of-preserved-flowers/, that's new to many. This stuff works on more than just roses so you may want to get a list of all the flowers that you can use this method on.
And you can get flower preservation kits from craft stores in your area as they are readily available and you can easily get them due to their popularity. If your local stores fail to supply appropriate flower preservation kits then another option would be to buy these online as several stores can be found that carry stocks of different types of flower preservation kits and packages to make the entire process quite easy for you.