Christmas cactus is easy to keep alive and fussy to bring into flower. It grows well in ordinary home conditions, but it only sets buds after weeks of long, dark, cool fall nights, and a plant kept in a lit living room often skips them.
If it won't flower, see why your Christmas cactus isn't blooming for the fall routine. If you have cats or dogs, the pet safety table has the toxicity rundown.
Light
Bright light with no strong midday sun. An east window suits it. In a south or west window, shade it from May to September, because direct summer sun scorches the segments. Gentle winter sun is fine.
Water
Water thoroughly when the top half of the mix feels dry, and pour off what collects in the saucer after about 15 minutes. After flowering, water sparingly until new growth appears. Sources put that rest at six weeks to two months.
Humidity
Average home humidity works. Very dry air and heating vents add to bud drop, so keep it away from vents while it's in bud.
Temperature
About 60-70°F (16-21°C) through the year. Nights of 50-55°F (10-13°C) in fall set flower buds. Keep it above 50°F (10°C) and out of drafts.
Fertilizing
Soluble houseplant fertilizer at half strength every 3-4 weeks from early spring through summer. Stop in late summer and ease off through fall and early winter.
Pruning
After flowering, pinch off the stem tips and spent flowers. This promotes branching, and more branches mean more flowers next year.
Toxicity to pets
Non-toxic to cats and dogs, according to the ASPCA. Chewing any plant can still cause mild stomach upset.
Common questions
Do I water a Christmas cactus like a desert cactus?
No. Water it when the top half of the mix is dry, which is more often than a desert cactus gets. It also needs a porous mix and a pot that drains, because wet roots are the main way it dies.
What kind of soil does it need?
A porous mix. The New York Botanical Garden suggests one part coarse sand or perlite to every three parts standard potting mix. Repot every two to three years, or when the roots fill the pot, and not while it's in bud.
Is a Christmas cactus the same as a Thanksgiving cactus?
They're close relatives, and a plant sold as one is often the other. Look at the edges of the segments: pointed teeth mean Thanksgiving cactus, rounded scallops mean Christmas cactus. Care is the same, but Thanksgiving cactus flowers a few weeks earlier.
Related articles
Why is my Christmas cactus not blooming?
A holiday cactus sets buds when fall nights are long, dark and cool: about 13 hours of total darkness, or nights of 50–55 °F (10–13 °C), for 6–8 weeks. Evening lamps, a warm room and a plant that's really a Thanksgiving cactus are the usual reasons it doesn't.
Overwatered or underwatered? How to tell the difference
Both look like a drooping, yellowing plant — but the fixes are opposites. Four checks that tell you which problem you actually have.
This guide was researched and written with AI assistance and reviewed by a human editor before publishing. How we use AI