Fishbone Cactus (Zigzag Cactus) care

Light

Bright but filtered. Fishbone Cactus burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Prefers bright, indirect light — an east window or a few feet back from a brighter one. A little gentle morning sun encourages flowering, but harsh direct sun bleaches and burns the stems; deep shade weakens growth and prevents blooms. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering fishbone cactus: when the top 2-3 cm of mix is dry, roughly every 7-10 days. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water moderately so the mix stays lightly moist, letting the surface dry between drinks; it is a jungle cactus, not a desert one. Reduce in winter for a cooler, drier rest that promotes flowering. Avoid soggy conditions that rot stems.

Soil and pot

Fishbone Cactus grows best in loose, airy epiphytic mix. Use a free-draining blend of cactus compost with orchid bark, coir, and perlite. The chunky, airy structure drains fast while holding light moisture, matching its perch in rainforest tree crooks. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Fishbone Cactus sits happiest at around 50-70% humidity and 16-27°C (60-80°F). Enjoys moderate to high humidity, which keeps the flat stems plump and glossy. A pebble tray, humidifier, or grouped plants help in dry rooms, though it tolerates average household humidity. If you keep the room above 16 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed fishbone cactus sparingly. Feed every 2-4 weeks in spring and summer with a balanced or low-nitrogen houseplant feed at half strength; a higher-potash feed ahead of autumn supports blooming. Pause feeding through the cooler winter rest. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on fishbone cactus in the Growli community. Each is annotated with the most common cause so you know where to start.

• No flowers — Needs maturity, bright indirect light, and a cool, drier winter rest to bloom. Provide that rest period and adequate light, and be patient with younger plants.
• Scorched or bleached stems — Excess direct sun pales and burns the flat stems. Move to bright indirect light with only gentle early sun.
• Root rot / limp stems — Overwatering or heavy soil rots roots and the stems go soft and yellow. Repot into airy mix and water only when the surface dries.
• Mealybugs — Cottony pests hide in the stem notches. Dab with 70% isopropyl alcohol on a swab and isolate the plant until the infestation is gone.

Propagation

Very easy from stem cuttings: take a length of stem, let the cut end callus for a few days, then insert into barely moist airy mix. Roots form within a few weeks in warm, bright, humid conditions, and cuttings establish reliably for a fuller basket. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Fishbone Cactus is pet-safe. ASPCA-listed as non-toxic to cats and dogs (Epiphyllum). The spineless stems carry no toxic chemical and pose no significant mechanical hazard, making it a well-suited trailing plant for homes with pets. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Fishbone Cactus deep-dive guides

Every aspect of fishbone cactus care, each with its own calibrated guide:

• Fishbone Cactus watering schedule
• Fishbone Cactus light requirements
• Best soil mix for fishbone cactus
• Fishbone Cactus fertilizing guide
• When to repot fishbone cactus
• How to propagate fishbone cactus
• Fishbone Cactus growth rate & size
• Fishbone Cactus cold hardiness
• Fishbone Cactus temperature & humidity
• Is fishbone cactus toxic to cats & dogs?
• Is fishbone cactus toxic to cats?
• Is fishbone cactus toxic to dogs?

Featured in these plant shortlists

Fishbone Cactus qualifies for 9 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best pet-safe trailing & hanging plants — Trailing and climbing plants the ASPCA lists as non-toxic to cats and dogs — safe for shelves and hanging pots in a pet home.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• Best fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Fishbone Cactus is also commonly called Zigzag Cactus or Ric Rac Cactus.

• Snake plant care — light, water and common problems
• Dracaena care — light, water and common problems
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• All 1284 plant care guides in the Growli library