Christmas cactus is a popular houseplant, especially one to give to a friend or family member at the winter holidays. I have three, and although I’m a self-described bad houseplant keeper, they are thriving despite, or perhaps because of, my neglect. Truth be told, a bit of attention is all these plants need. If you want to get them to bloom at Christmas, there is a little more work, but it is far from impossible and the reward is well worth the effort.
Water: While the common name includes "cactus," these are not desert plants. Christmas cactus comes from the tropical rain forest, where it grows on top of tree branches. It has higher water and humidity requirements.
As a houseplant, if its soil is kept too dry the Christmas cactus will droop and drop leaves, flowers or buds. Therefore, water regularly and deeply until water runs out the bottom of the container. When the top inch of potting mix feels dry, it is time to water.
This jungle plant also appreciates humid air. See the tips in "Increase Humidity for Houseplants."
Food: Use an all-purpose houseplant fertilizer when the plant is actively growing or blooming, following the package directions.
Soil: Use a loose, well-draining soil, preferably a succulent or orchid mix. Although Christmas cactus likes regular watering, it also needs good drainage. Keep in mind how it naturally lives in the canopy of the rain forest!
Light: Place in bright, indirect light for the best blooms. Christmas cactus will grow surprisingly well in low light, but it will have fewer blooms. These plants can go outdoors for the summer, but keep them out of direct sunlight.
How to get Christmas cactus to bloom at Christmas:
Starting in mid-October, place the Christmas cactus in complete darkness for 12 to 13 hours a day—such as inside a closet from 8 p.m. to 8 a.m. In about eight weeks, buds should form. Then you can keep the plant in one spot where it will be happy. (Moving it around to different light levels or temperatures may cause it drop its buds.)
