Planting poinsettias after Christmas is an easy process! Simply take the pot of the poinsettia and remove the plant from the soil. Cut off any dead stems and leaves, and then replant the poinsettia in a larger pot with fresh soil. Water the plant well and place it in a location with bright, indirect sunlight. Make sure to keep the soil moist but not overly wet, and fertilize the plant once a month during the growing season. With proper care, your poinsettia should continue to thrive and bloom each year!