There are quite a few plants associated with the Christmas holiday.  Here is some background on how  it came about

The tradition of kissing under Mistletoe had an odd beginning.  It comes from Norse mythology where Thor’s grandson was in fear of being killed by every living creature.  His parents asked each living object to spare their son, but forgot to ask the Mistletoe.  Unfortunately he was killed by an arrow made from the Mistletoe.  After that, it was hung in doorways to remind us to consider the Mistletoe.  Somehow that evolved into the current tradition.

Rosemary was supposedly used to scent baby Jesus’ clothing in the manger.  It was also sprinkled on the floors of homes during the Middle Ages to ward off evil and bring good luck.

Poinsettias were given to baby Jesus by a poor girl as a gift.  The have gorgeous blooms in winter so it was natural to use as Christmas decoration.

Holly and Ivy were used in early Europe to symbolize eternal life.  Because they are both evergreen, they were often used as decoration in winter and eventually, the association with Christmas became permanent.

Decoration of Evergreen Trees is tribute to Martin Luther who wanted to bring the beauty of the nighttime forest and stars indoors during the holidays.  That tradition has since evolved into today’s elaborate decorations and family fun.

Merry Christmas!