The fishbone cactus (Epiphyllum anguliger or Selenicereus anthonyanus) is a tropical rainforest epiphyte that prefers care more like a tropical houseplant than a desert cactus.
Light Requirements
- Bright, indirect light: Place near an east- or south-facing window out of harsh direct sun, which can burn the leaves or turn them reddish-brown.
- Dappled shade: They thrive under filtered light, mimicking their native jungle canopy.
Watering
- Moist, well-drained soil: Water thoroughly when the top 2 to 3 inches of soil dry out.
- Avoid soggy roots: Unlike desert cacti, they like moisture, but sitting in standing water causes root rot. Use room-temperature or dechlorinated water.
- Winter reduction: Cut back on watering slightly during the cooler winter months when the plant rests.
Soil & Potting
- Chunky, airy mix: Combine equal parts standard cactus/succulent mix, perlite, peat moss, and orchid bark.
- Porous containers: Use terracotta or unglazed ceramic pots with drainage holes.
- Repotting: Refresh the soil and move to a slightly larger pot every 2 years.
Temperature & Humidity
- Warm climate: Keep temperatures between 60°F and 78°F (15°C–25°C). Protect from frost and cold drafts.
- Higher humidity: They prefer humidity above 50%–60%. Mist occasionally or place a humidifier nearby.
Fertilizing & Pruning
- Feeding: Fertilize monthly or during spring and summer growing seasons using a balanced or low-nitrogen succulent/orchid fertilizer.
- Pruning: Trim dead, damaged, or unruly stems with sterile shears during spring.