In the Victorian era, it was decided that different plants and flowers had special, unique meanings. At that time, people began to use flowers to send each other personal messages or secret correspondances in situations where they would otherwise be unable to express themselves or their feelings for one another. Nowadays, although we are much more able to express our emotions openly, using flowers as a way to send a subtle message to a friend or your sweetheart is an extra-special way to add meaning to your wedding day.
Some common flowers that are often used to express a variety of positive emotions are as follows:

Bluebells
These gorgeous, often purple or blue downward-facing bulbs, were commonly used to express kindness and gratitude. Due to those expressions, they were also often used to symbolize everlasting love. Since they generally flower between April and June, bluebells would be a perfect edition to your spring wedding, to represent the gratitude and love between you and your future spouse. Tulips
Another very common flower used in floral communication was the tulip, a flower that comes in so many colors that it has many meanings, each depending on the color of the beautiful flower being presented. Traditionally, tulips in general are associated with perfect, passionate love, although you can add intricacies to that by varying the colors involved. For example, white tulips symbolize royalty or purity while yellow tulips are meant to be welcoming and friendly. Tu...