If your holiday poinsettia comes in a container wrapped in a foil outer cover, be sure to remove it or punch holes in the bottom to allow excess water to drain. Keep the soil around your poinsettia slightly moist, but not soggy and place the plant in a bright window out of direct sunlight.
There are two types of flowering holiday cactus, the Christmas cactus and the Easter cactus. The Christmas cactus, Zygocactus truncates, usually flowers from Thanksgiving to Christmas, and its leaves have pointed lobes. The Easter cactus, Schlumbergera bridgessii, has wider leaves, which are rounded. It usually flowers from Christmas to Easter. Allow soil to dry out between watering, and keep the plant in bright light while in bloom. These are long-lived plants and can be kept outside in the shade during most of the year. They do need to be protected from frost and freezing temperatures.
Kalanchoe, a winter blooming succulent, has become popular as a holiday plant. The showy flowers are in terminal clusters and last for several weeks. Flower colors are yellow, pink, red and various shades of orange. Since this is a succulent plant, let the soil dry out between watering.