Fishbone Cactus
Disocactus anguliger (syn. Epiphyllum anguliger)
Through the year 🗓️
☀️ Summer now
Its thirstiest season. Check weekly, and shield it from hot direct afternoon sun.
🍂 Fall
Ease off water and food; cooler, drier fall nights help set the fragrant flower buds.
❄️ Winter
Rest it cool and bright, watering only when the stems just start to soften.
🌱 Spring
Repot or refresh the chunky mix if needed and resume monthly feeding as new zigzag growth appears.
The details
Light & placement
- Light
- Bright indirect with a little gentle morning sun; harsh midday sun scorches the stems
- Ideal PPFD
- 200–400 µmol·m⁻²·s⁻¹
- Grow-light distance
- 12–18 in below LED
Water & feed
- Watering method
- A jungle cactus, not a desert one, so water when the top 1–2 in dry, before the stems go limp. It wants tropical treatment: more water, more humidity, less sun than its desert cousins.
- Fertilizer
- Balanced feed at ½ strength, monthly in spring–summer.
Home & habit
- Soil
- Chunky epiphytic mix: cactus mix cut with orchid bark and perlite; pH 5.5–6.5
- Humidity
- Moderate–high (50–60%+); appreciates a bathroom or pebble tray
- Temperature
- 60–80 °F
- Mature size
- Stems trail 2–3 ft; great in a hanging pot
- Repotting
- Every 2–3 yrs; slightly root-bound plants bloom better
- Propagation
- Stem cuttings: let a zigzag segment callus 2–3 days, then root in water or barely-moist mix. Very easy.
When something looks wrong
- Overwatering signs
- Yellowing, mushy stem bases; rot spreading up the zigzags
- Underwatering signs
- Flat, limp, wrinkled stems that have lost their sheen
- Common pests
- Mealybugs, fungus gnats, scale
Common problems 🩺
The usual suspects when Fishbone Cactus looks unhappy. Most houseplant trouble is watering or light, not disease — see all plant problems if you are not sure which plant is the culprit.
Mushy, yellowing stems
Likely cause
Overwatering. It is a jungle cactus, but it still rots.
What to do
Let the top inch dry and use an airy, orchid-bark-heavy mix.
Never flowers
Likely cause
It needs maturity plus a cool, drier rest in winter to set buds.
What to do
Give it bright indirect light and a cooler, drier spell for a few weeks in winter.
Shrivelled, crisping stem edges
Likely cause
Too dry — it wants more humidity than a desert cactus.
What to do
Water when the top inch dries and raise humidity above 50%.
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