How to Care for Fishbone Cactus | Light, Water & Soil Rules

Fishbone cactus care succeeds by placing it in bright, indirect light, watering when the soil partly dries, and using a fast-draining, chunky potting mix in a pot with drainage holes.

Overwatering is the fastest way to kill this plant. The fishbone cactus (Disocactus anguliger or Epiphyllum varieties often sold as ric rac cactus) is an epiphyte, and its roots rot when they stay wet. The whole care routine—light, soil, water, and container—is built around that one fact. Get that right, and the rest is simple.

Light: Bright and Indirect, No Harsh Sun

The fishbone cactus needs bright, indirect light, but direct midday sun will scorch its flat stems. The most consistent guidance from The Spruce and Gardening Know How is to place the plant near an east- or west-facing window where it gets a few hours of gentle morning or late-afternoon light. A south-facing window is acceptable only if a sheer curtain filters the intensity. Low light causes thin, weak growth; hot direct sun burns the leaves fast.

Watering: The Dry-Inch Rule

Water when the top inch or two of soil is dry to the touch. Water thoroughly until it drains from the bottom, then let the pot empty completely—never let the plant sit in standing water. Some growers bottom-water by setting the pot in a tray for 30 minutes to an hour, but drainage afterward is non-negotiable. In autumn and winter, water much less and let the soil go fully dry between waterings; the plant enters a dormant period that makes wet soil dangerous.

If the stems start to pucker or go soft, the plant is water-stressed from drying out too long—give it a good soak and it will usually plump back up within a day or two.

Soil & Potting: Airy, Chunky, and Fast-Draining

Use a chunky, aerated mix that holds some moisture but drains quickly. Common recipes combine cactus mix with orchid bark, perlite, peat, or sphagnum moss. The pot must have drainage holes—terracotta or unglazed clay pots are ideal because they wick extra moisture from the soil and help prevent rot. Repot every 2 to 3 years or when the plant outgrows its container, preferably after blooming.

Temperature, Humidity & Fertilizer

Keep the plant in normal indoor temperatures between 65°F and 85°F (18–26°C), away from cold drafts and freezing conditions. Moderate to high humidity helps: set the pot on a pebble tray, mist lightly, or run a small humidifier in dry rooms. Feed lightly once a month in spring and summer with a balanced cactus or houseplant fertilizer; stop feeding entirely in fall and winter.

Need a support for your fishbone cactus as it grows tall and trailing? Our tested fishbone cactus plant stake roundup covers the best options to keep stems upright and tidy.

Common Mistakes & Quick Fixes

• Overwatering: The number one killer. Always let the mix dry partly between waterings and use a drainage-hole pot. If leaves turn yellow or mushy, reduce watering immediately and check for root rot.
• Too much direct sun: Scorched, bleached patches on stems. Move to an east or west window or shade with a curtain.
• Too little light: Stems grow long, thin, and weak. Move to a brighter spot with indirect sun.
• Cold drafts or frost: Leaves may curl, discolor, or drop. Keep away from windows in winter and out of any room below 50°F.
• Puckered stems: Sign of underwatering or prolonged dry soil. Water deeply and the stems should rehydrate.

Because care recommendations vary across sources on exact watering and fertilizing schedules, the smartest approach is to watch the plant and adjust to your home’s light, temperature, and season rather than follow a rigid calendar.

Propagation

Cut a healthy stem piece, let the cut end callus over for a few days (to prevent rot), then plant it in the same chunky soil mix. Water sparingly until roots form, then treat it like a mature plant.