Floriography, the practice of sending coded messages through flowers, enjoyed popularity in England during the Victorian era and the United States during the 19th century. Through flowers, lovers could send messages to their sweethearts they couldn't say aloud.
Roses are often chosen to express feelings of love — with their variety of colors, there's a lot that can be said. With different hues, come nuance.
If you want to get more specific this Valentine's Day, though, here are some floral arrangements based on traditional symbolism that may come in handy.