Tree Talk: Holiday plant traditions

In addition to Christmas trees, there are other plants that have become traditional during the holiday season. Poinsettias are native to Mexico, but are grown in commercial greenhouses under special conditions, to prepare them for distribution before Christmas. The plant was introduced to the U.S. in 1828 by J. Poinsett, the first U.S. ambassador to Mexico. More than 75 million poinsettias are sol...