She could care less that snow is still on the ground. A symbol of strength and perseverance in Chinese culture, the plum blossom is characterized so because of her insistence on blooming in winter, standing up to the chill until spring arrives. Like a letter from afar, there is beauty in anticipation.
Your Thank You Notes should reflect your aesthetic, whether it's classic, romantic, minimalist or modern. The recipient of said note should know who it's from even before he/she reads a word.