String of Fishhooks (Fishhook Senecio) care

Light

In the wild string of fishhooks grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Wants bright indirect light with some direct sun, which keeps growth compact and the hooks plump. In low light the stems stretch and the leaves space out. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for when soil is fully dry, roughly every 10-14 days in growth for string of fishhooks, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Drought-tolerant; water deeply then let the mix dry out completely. The fleshy hooks shrivel when very thirsty. Reduce to about monthly in winter to avoid rot.

Soil and pot

String of Fishhooks grows best in gritty, fast-draining cactus and succulent mix. Cactus compost amended with perlite or pumice gives the sharp drainage these roots need. Always use a pot with drainage holes. 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

String of Fishhooks sits happiest at around 30-50% humidity and 18-27°C (65-80°F). Happy in average to low household humidity. It stores its own water and resents damp, poorly ventilated conditions that invite rot. If you keep the room above 18 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 string of fishhooks sparingly. Feed once a month in spring and summer with a half-strength balanced or cactus fertiliser. It is a light feeder; excess nitrogen causes soft, stretched stems. No feeding in autumn or winter. 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 string of fishhooks in the Growli community. Each is annotated with the most common cause so you know where to start.

• Shrivelled hooks — Indicates underwatering. A deep soak usually re-plumps the leaves; check that the mix had dried fully first.
• Soft, rotting stems — From overwatering or dense soil. Use gritty mix, water only when dry, and cut away any mushy sections.
• Leggy stretched growth — Too little light spaces out the leaves. Move to a brighter spot and trim long stems to encourage fullness.
• Mealybugs — Common on succulents; treat with insecticidal soap or dab with isopropyl alcohol, repeating weekly until clear.

Propagation

Very easy from stem cuttings: lay a length of stem on gritty mix or bury a few nodes; roots form quickly at the nodes. Cuttings also root in water before potting up. 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

String of Fishhooks is toxic to pets. As a Curio (formerly Senecio), this plant falls under the ASPCA's toxic listing for string-of-pearls-type Senecio. The sap can cause vomiting, drooling and gastrointestinal upset if ingested, and may irritate skin. Keep the trailing stems away from cats and dogs. 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.

String of Fishhooks deep-dive guides

Every aspect of string of fishhooks care, each with its own calibrated guide:

• String of Fishhooks watering schedule
• String of Fishhooks light requirements
• Best soil mix for string of fishhooks
• String of Fishhooks fertilizing guide
• When to repot string of fishhooks
• How to propagate string of fishhooks
• String of Fishhooks growth rate & size
• String of Fishhooks cold hardiness
• String of Fishhooks temperature & humidity
• Is string of fishhooks toxic to cats & dogs?
• Is string of fishhooks toxic to cats?
• Is string of fishhooks toxic to dogs?

Featured in these plant shortlists

String of Fishhooks qualifies for 8 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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 drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Best succulents for beginners — The easiest succulents and cacti to keep alive — selected by documented growth habit, each with the light and watering it actually wants.
• Best houseplants to propagate in water — Houseplants that root from a cutting in a glass of water — the easiest, cheapest way to turn one plant into many.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Best fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

String of Fishhooks is also commonly called Fishhook Senecio.

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