Schlumbergera “Crab Cactus” (Thanksgiving Cactus)

Native to the tropical rainforests of Brazil, this cactus is an epiphytic plant, which means it naturally grows on trees or rocks rather than in the ground. It belongs to the same family as the Christmas Cactus, but the Thanksgiving Cactus typically blooms earlier, around late fall and early winter, hence its common name.

The Thanksgiving Cactus gets its “Crab Cactus” nickname due to the crab claw-like shape of its leaf segments, which have pointed edges compared to the rounded edges of the Christmas Cactus. The plant produces tubular flowers in various colors, including pink, red, white, yellow, and orange, making it a striking addition to any home during the holiday season.

Plant Care for Schlumbergera “Crab Cactus” (Thanksgiving Cactus)

1. Light:

   • The Thanksgiving Cactus thrives in bright, indirect light. It can tolerate some direct sunlight in the early morning or late afternoon, but too much intense sun can cause the leaves to turn red or brown. Place it near a bright window but out of the harsh midday sun for the best growth and flowering.

2. Watering:

   • Water the Thanksgiving Cactus when the top 1-2 inches of soil feel dry. The plant prefers moist but well-draining soil and should not be allowed to sit in water. Overwatering can lead to root rot, so always make sure the pot has proper drainage. Water less frequently during the winter months when the plant is not actively growing.

3. Humidity:

   • As a tropical plant, the Thanksgiving Cactus prefers higher humidity levels, although it can adapt to average household humidity. Misting the plant occasionally or placing it near a humidifier can help keep the air moisture levels up, especially during dry winters.

4. Temperature:

   • Thanksgiving Cactus prefers temperatures between 60°F to 70°F (15°C to 21°C). It can tolerate slightly cooler temperatures, but exposure to temperatures below 50°F (10°C) can damage the plant. Avoid placing it near drafts, heaters, or air conditioners, as it prefers a consistent environment.

5. Soil:

   • Use a well-draining potting mix, such as a cactus or succulent mix, with added organic matter like peat or coconut coir to retain some moisture. The soil should not stay soggy, so ensure the pot has good drainage to prevent waterlogging.

6. Fertilizing:

   • Feed the Thanksgiving Cactus with a balanced, water-soluble fertilizer every month during the growing season (spring and summer). Reduce or stop feeding during the fall and winter when the plant is preparing to bloom or is dormant.

7. Flowering:

   • To encourage blooming, provide the plant with cooler temperatures and shorter daylight hours in the fall, which mimics its natural habitat’s conditions. Reduce watering and give the plant about 12-14 hours of darkness each night for 6 weeks. After this period, the Thanksgiving Cactus should produce buds and bloom around late November.

8. Pruning:

   • After the plant finishes flowering, you can prune or pinch off the segments to shape the plant and encourage bushier growth. Pruning the plant helps manage its size and promotes new growth in the spring.

9. Repotting:

   • Repot the Thanksgiving Cactus every 2-3 years in fresh soil, preferably in the spring after it finishes blooming. Choose a slightly larger pot to give the roots more space to grow, but avoid a pot that is too large, as the plant prefers to be slightly root-bound.

10. Propagation:

    • The Thanksgiving Cactus is easily propagated through stem cuttings. Take a cutting of a few segments, let it dry for a day or two, and then plant it in moist soil. The cutting should root within a few weeks.

11. Pest Control:

    • Thanksgiving Cactus is relatively pest-resistant, but it can occasionally attract mealybugs, spider mites, or aphids. Inspect the plant regularly, and treat infestations with insecticidal soap or neem oil if necessary.

12. Toxicity:

    • The Thanksgiving Cactus is non-toxic to humans and pets, making it a safe choice for homes with children and animals.