Do not expect to keep a gift plant from year to year. Enjoy them while they are attractive and in-season and then discard. The poinsettia requires bright light and should be kept away from drafts. Keep plants well- watered but do not overwater. Some of the newer, long-lasting varieties can be kept attractive all winter.
Gardeners frequently ask whether they can carry their poinsettias over to bloom again next year.
However, for those who wish to try, the following procedure can be followed. Cut the plants back to within 5 inches of the ground and re-pot in fresh soil. As soon as new growth begins, place in a well-lighted window. After danger of frost, place the pot outdoors in a partially shaded spot. Pinch the new growth back to get a plant with several stems.