The Christmas cactus (Schlumbergera bridgesii) is a delightful plant, noted for its ease of growth and vibrant winter blossoms—a welcome sight during chilly months. If yours is struggling, it might be due to too much care. Unlike many houseplants, these succulents thrive on neglect, requiring minimal water and favoring slightly rootbound conditions. Here’s everything you need to know to revive your Christmas cactus and enjoy its cheerful blooms.
Overwatering Woes
As succulents and epiphytes, Christmas cacti store water efficiently and prefer less frequent watering. Overwatering can lead to root rot. To avoid this, plant your cactus in a pot with drainage holes. Water only when the soil feels dry and allow excess water to drain completely. Avoid letting your cactus sit in water.
Choosing the Right Soil
Standard potting soil is too heavy for the Christmas cactus. Instead, opt for a lighter mix that allows air to circulate around the roots. Consider using lightweight expanded clay aggregate (LECA) or create a blend with two parts potting soil and one part clean sand. Alternatively, use 40% perlite and 60% peat moss, but remember that peat moss may require more frequent repotting.
Proper Pot Sizing
These plants prefer being slightly rootbound, so don’t rush into repotting. Usually, repot every three years, or when roots start appearing in drainage holes. When repotting, choose a pot just an inch larger than the current one, and ensure the root ball sits about an inch below the pot’s rim.
Maintaining Adequate Humidity
Originating from Brazilian rainforests, Christmas cacti appreciate humidity levels of 50–60%. You can increase local humidity by misting the plant, using a nearby humidifier, or setting up a humidity tray. Alternatively, place the cactus in the bathroom when showering.
Managing Temperature
Despite the name, Christmas cacti enjoy warm temperatures. Keep their environment between 70 to 80 degrees Fahrenheit when not budding, and ensure they aren’t exposed to cold drafts or windowsills during winter. Use draft-free spots and be mindful of artificial drafts from appliances like air conditioners and dehumidifiers.
Feeding Your Plant
Post-blooming, fertilize your Christmas cactus with a balanced 10-10-10 or 20-20-20 fertilizer once a month at half strength until September. Pause during flowering and resume once it ends. You can also use kitchen scraps for nourishment.
Pruning for Shape and Growth
Pruning after the cactus blooms encourages a compact shape and promotes new growth. Trim back leaves carefully and use the cuttings to grow new plants in well-draining soil with ample light.
Ensuring Dormancy for Blooming
Christmas cacti need dormancy to bloom. Simulate their natural 13-hour darkness by placing them in a cool, dark area or restricting light exposure by covering them at night starting in October.
Avoiding Bud Drop
After buds form, avoid moving your cactus or altering its environment, as this can cause bud drop. Consistency in light, temperature, and location is key to maintaining blooms.
Optimizing Lighting
Place your cactus in a room with plenty of indirect light or in an east-facing window. Avoid direct sun exposure, which can burn leaves, and ensure some light is present without deep shade.
By following these guidelines and respecting the cactus’s natural preferences, you can revive your plant’s health and ensure a stunning display of blossoms each year. Enjoy the vibrant beauty and tranquility this charming plant brings to your home!