They said that the poinsettia easily symbolized purity, holiness, and wisdom or intelligence.
It was believed that evergreens would keep away witches, ghosts, evil spirits, and illness.
Like many Christmas traditions, the origin of this delicious custom lies ages ago, in solstice rituals conducted long before Christmas became the huge commercial holiday it is today.
Legend says the original Saint Nicholas, who traveled around bringing gifts and cheer to those in need, came upon a small village one year and heard of a family in need.
It is supposed to possess mystical powers which bring good luck to the household and wards off evil spirits. It was also used as a sign of love and friendship in Norse mythology and that's where the custom of kissing under Mistletoe comes from.
The prickly leaves represent the crown of thorns that Jesus wore when he was crucified. The berries are the drops of blood that were shed by Jesus because of the thorns.