Rutgers University recently conducted a 10 month study that explored the link between flowers and life satisfaction. Participants actually reported feeling less depressed and agitated and showed a higher sense of enjoyment and life satisfaction after receiving flowers.
Now... since I operate a green blog, here is my eco-friendly twist.
When sending flowers next time, send a potted flower. This not only reduces the need to harvest and destroy flowers by cutting them, but the recipient of your kindness can actually keep the flowers potted in their home or plant them in their garden and always have an everlasting reminder of the sentiment that you shared.