Schlumbergera Truncata
Schlumbergera truncata
📖 About this plant
Schlumbergera truncata, commonly called Thanksgiving Cactus or Crab Cactus, is a beloved winter-blooming epiphytic cactus from Brazil’s coastal mountains. Unlike desert cacti, it grows on tree branches in humid, shaded rainforests. Its flat, segmented stem pads have distinctive pointed teeth along the margins, resembling crab claws. The spectacular flowers appear in late autumn to early winter, just in time for the holiday season, with cascading blooms in vibrant shades of pink, red, white, and lavender. Individual plants can live for decades and even become family heirlooms, producing more abundant flowers as they mature. It’s one of the most rewarding and reliable flowering houseplants.
🧑🌾 Care requirements
Bright Indirect Light to Light Shade (no direct sun)
When top 2-3 cm of soil is dry (weekly in summer, reduce in winter)
50-70%
15-25°C (60-77°F)
Well-draining epiphytic cactus mix with orchid bark, perlite, and peat moss
Balanced liquid fertilizer monthly from spring through autumn
🌐 Common Names
📋 Plant facts
- 🌍 Origin
- Brazil (epiphytic cactus from coastal mountains, grows on trees)
- 📏 Max height
- 30-45 cm (12-18 in) trailing or arching stems
- 📐 Spread
- 30-45 cm (12-18 in) wide
- 🕰️ Bloom time
- Late autumn to winter (November to January — triggered by short days)
- 🎨 Bloom color
- Pink, red, white, orange, lavender, or bicolor flowers 5-8 cm (2-3 in) long
- 🍃 Foliage color
- Flat, green, segmented stem pads with small pointed teeth along margins (crab claw shape)
- ⏳ Lifespan
- Perennial (20-50+ years — extremely long-lived)
- 📈 Growth rate
- Moderate
- ☠️ Toxicity
- Non-toxic to humans and pets — ASPCA lists as safe
- 🌱 Propagation
- Stem segment cuttings — twist off 2-3 segments, allow callus 1-2 days, place on moist soil; roots in 3-4 weeks
🛡️ Health & Safety
Non-toxic to humans and pets — ASPCA lists as safe
Common issues
- Bud drop from temperature fluctuations
- drafts
- or overwatering
- no flowers without short-day period in autumn
- shriveled segments from underwatering
- root rot from heavy soil
- mealybugs and scale insects on segments
💡 Care tips
- For reliable holiday blooming, provide 12-14 hours of complete darkness daily for 6-8 weeks starting in late September.
- Keep the plant cool (15-18°C/60-65°F) during this period.
- Once buds form, don't move the plant — even rotating can cause bud drop.
- This is a rainforest cactus — never let it dry out completely.
- Unlike Christmas Cactus, Thanksgiving Cactus has pointed teeth (not rounded).
- Can live 50+ years with proper care.
