During the victorian period it was very common to send messages with floweres, a custom that is no longer followed but some meanings remaning, for example the color of the flowers.
Why not say what you feel with flowers?
White: Innocence, purity, humility
Yellow: Friendship, dying love, agonizing love, platonic love. In some countries it means jealousy or infidelity.
Lavender: Love at first sight.