The poinsettia has long been associated with Christmas due to its vibrant red coloration and association with the holiday season. The tradition of decorating homes with poinsettias during the holidays began in the late 1800s when they were brought to the United States from Mexico by a man named Joel Roberts Poinsett. He was so impressed by their beauty that he began growing and selling them as Christmas decorations. Since then, poinsettias have become a staple of Christmas decorations and are now a beloved symbol of the holiday season.