Repotting guide

When & how to repot Fishbone Cactus (Epiphyllum anguliger)

Also called Zigzag Cactus, Ric Rac Cactus.

More about fishbone cactus

About Fishbone Cactus

Epiphyllum anguliger · also called Zigzag Cactus, Ric Rac Cactus · houseplant

The fishbone cactus is a Mexican epiphyte grown for its deeply zigzagged, flat green stems that trail like a fish skeleton. Easy and forgiving, it thrives in bright indirect light, an airy fast-draining mix, and moderate watering, rewarding a cool dry winter with fragrant night-opening flowers. A spineless jungle cactus and ASPCA-listed non-toxic to pets.

Mature size: Trailing stems commonly reach 60-90 cm long, draping well over the rim of a hanging pot.

Watch for — 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.

How to tell fishbone cactus needs repotting

Repotting on a calendar is less reliable than reading the plant. For fishbone cactus, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot fishbone cactus

Every 2–3 years, into bone-dry mix. Fishbone Cactus's growth habit — trailing, freely branching epiphyte of flat, deeply lobed zigzag stems that arch and cascade — ideal for a hanging basket — with fragrant night-blooming flowers appearing on mature plants. — sets the pace. The fishbone cactus is a Mexican epiphyte grown for its deeply zigzagged, flat green stems that trail like a fish skeleton. Easy and forgiving, it thrives in bright indirect light, an airy fast-draining mix, and moderate watering, rewarding a cool dry winter with fragrant night-opening flowers. A spineless jungle cactus and ASPCA-listed non-toxic to pets.

What size pot to step fishbone cactus up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Fishbone Cactus stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot fishbone cactus

Spring or summer, while fishbone cactus is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting fishbone cactus

Repot dry. Do not water fishbone cactus for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty loose, airy epiphytic mix ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set fishbone cactus at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep fishbone cactus completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for fishbone cactus

Fishbone Cactus wants 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. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting fishbone cactus — frequently asked questions

How often should you repot fishbone cactus?

Every 2–3 years, into bone-dry mix for fishbone cactus. Repot fishbone cactus every 2–3 years into a snug pot of loose, airy epiphytic mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does fishbone cactus need?

When is the best time of year to repot fishbone cactus?

Should you water fishbone cactus after repotting?

No — not straight away. Repot fishbone cactus into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise fishbone cactus after repotting?

Not immediately. Wait about 3 weeks after repotting fishbone cactus. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.