Schlumbergera truncata
Schlumbergera truncata · Cactaceae
📷 JennTM · CC BY-SA 4.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around schlumbergera truncata and prepare for winter.
ID card
- Foliage
- Evergreen, tender green, segmented and flattened
- Flowering
- November to January, pink, red or white flowers depending on variety
- Adult size
- 30 to 40 cm in height, trailing habit
- Growth
- Moderate, faster under optimal conditions
- Hardiness
- Tender, minimum 10 °C required
- Origin
- Brazil (humid tropical forests)
- Soil type
- Well-draining, cactus potting mix or light blend
- Light
- Bright indirect light, dislikes intense direct sun
Expert tips
The key tip
Keep the substrate slightly moist during growth (spring-summer), never waterlogged; drastically reduce watering in fall-winter. The secret: this cactus prefers well-draining compost rich in organic matter (potting soil + perlite 50/50), not pure sand. Repot every 2-3 years after flowering.
The common mistake
Most gardeners kill it by overwatering in winter, thinking all cacti love dryness: it rots easily in substrate that stays wet, unlike desert cacti.
The pro's trick
To guarantee abundant flowering in December, impose 4-6 weeks without watering starting in September, with cool nights (12-15°C): this contrast triggers flower buds. Once the first buds appear, resume moderate and regular watering.
Seasonal watch
In fall, the classic trap is watering too soon or too much: wait until the substrate is really dry on the surface before watering, otherwise it aborts its buds. In winter, exposure near a cold window (but without freezing) is ideal for flowers.
Care
Watering
Water regularly during the growing season (spring-summer), letting it dry out slightly between waterings. In autumn and winter, reduce watering, especially before flowering, as overly moist soil causes root rot. Use room-temperature water that is preferably non-calcareous.
Light and Temperature
Place your Christmas cactus in bright indirect light, away from scorching rays. Maintain temperatures between 15 and 25 °C under normal conditions. To encourage flowering, a cool rest period (10-15 °C) with short days in autumn (October-November) is beneficial.
Pruning and Pinching
Pruning is not mandatory, but pinch back the stems after flowering to encourage branching and a denser habit. You can also gently remove faded or misshapen segments. These interventions are best done in February-March, after flowering.
Fertilizer
Apply a balanced diluted fertilizer every 15 days during active growth (April to September). Stop feeding in autumn and winter to avoid disrupting the rest phase. A fertilizer slightly higher in potassium promotes abundant flowering.
Soil and Repotting
Use a highly draining substrate: mix regular potting soil with perlite or pumice (2:1 ratio). Repot every 2-3 years in spring into a slightly larger pot. Ensure the pot has drainage holes to prevent water stagnation.
Diseases and Pests
Watch for mealybugs and spider mites, especially in dry air. Root or crown rot is the main risk, resulting from excess moisture. If problems occur, isolate the plant and drastically reduce watering. Good drainage and sufficient aeration prevent most issues.
Did you know?
The Christmas cactus owes its name to its spectacular flowering that coincides with year-end celebrations in the Northern Hemisphere. Unlike desert cacti, it originates from the humid tropical forests of Brazil where it grows as an epiphyte on trees, explaining its need for moisture and relative shade, quite distinct from its xerophytic cousins.
Where to buy it
Plant in spring, once all risk of frost has gone. Pick a plant with healthy foliage and roots that are not exposed. Best time: from April to June.
Add this plant to my garden →Plants from the same family
- SaguaroCarnegiea gigantea
- Erect prickly pearOpuntia stricta
- Hedgehog pearOpuntia polyacantha
- Tree chollaCylindropuntia imbricata
- Opuntia basilarisOpuntia basilaris
- Ferocactus wislizeniFerocactus wislizeni
Tips generated and checked by Viridia — adapt them to your local climate.