Sunflowers symbolize unwavering faith and unconditional love. Perfect for sending to your loved one if you want to fully express how much you love him/her. The yellow color of the sunflower symbolizes vitality, intelligence and happiness. The color yellow also traditionally symbolizes friendship. Whether you're just trying to brighten someone's day or show how much you admire them, the vibrant, playful nature of sunflowers makes them a great choice.