Christmas cactus brings a splash of color indoors just as many outdoor plants are winding down for the year. Despite its name, this popular houseplant is a tropical rainforest native, so it needs a different routine from the desert cacti it resembles.
Bright, indirect light is best. Place the plant near an east- or west-facing window, away from harsh direct sun, drafts and heating vents. Use a pot with drainage holes and a light, well-draining mix. Water when the top inch of soil feels dry, then empty any water left in the saucer. Soil that stays soggy can lead to root rot, while letting it dry out completely can cause buds or flowers to drop.
Encourage a Holiday Bloom
In fall, shorter days and cooler nights signal the plant to form flower buds. For six to eight weeks, give it about 12 to 13 hours of uninterrupted darkness each night. A bright room light, television or nearby outdoor light can interrupt that dark period. Nights around 55 to 65 degrees can also help encourage buds.
During this period, water less often, but do not let the soil dry out completely. Once buds appear, return to regular watering and keep the plant in one steady spot. Moving it, exposing it to drafts or placing it near a heat source can cause buds to fall before they open.
A Few More Care Tips
Holiday cacti can spend the summer outdoors in a warm, shaded spot, but bring them inside before temperatures drop near freezing. Feed during the growing season, generally from spring through early fall, and ease off on fertilizer in fall and winter.
The name on the plant tag can be confusing. Thanksgiving cactus often blooms earlier and has pointed teeth along its stem segments, while Christmas cactus typically has more rounded, scalloped edges. Both respond to similar care.
For pet parents deciding which plants to bring home, the ASPCA lists Christmas cactus as non-toxic to cats and dogs. As with any houseplant, keep it where pets and young children won’t chew on it; swallowing a large piece could pose a choking risk.
With well-drained soil, careful watering and long, dark fall nights, a holiday cactus can reward its caretaker with bright winter flowers.
