String of Pearls (String of Beads) care

Light

In the wild string of pearls 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. Prefers bright indirect light with a few hours of gentle morning sun. Direct afternoon sun can bleach and shrivel the pearls. An east-facing window or a spot a metre from a south-facing window is ideal. 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 every 2–3 weeks in spring and summer; every 4–6 weeks in autumn and winter for string of pearls, 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. Allow the top half of the soil to dry out before watering. Overwatering is the most common cause of death — shrivelled pearls are more often a sign of overwatering (root rot) than underwatering. Water at the base, not on the pearls.

Soil and pot

String of Pearls grows best in fast-draining cactus or succulent mix. Use a commercial cactus mix blended with extra perlite (1:1 ratio). The roots are fine and shallow — a wide, shallow pot with drainage holes is preferable to a deep container. 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 Pearls sits happiest at around 30–50% humidity and 10°C to 27°C (50°F to 80°F). Prefers moderate to low humidity. Tolerates typical indoor levels well. Avoid placing near humidifiers or in bathrooms where moisture levels are consistently high, as this promotes rot. If you keep the room above 10°C to 27°C 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 pearls sparingly. Feed once a month during spring and summer with a half-strength, balanced liquid fertiliser or a cactus-specific feed. Do not fertilise in autumn and winter when growth slows. 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 pearls in the Growli community. Each is annotated with the most common cause so you know where to start.

• Shrivelled pearls and root rot — Counterintuitively, shrivelled pearls are most often caused by overwatering leading to root rot, not underwatering. Check roots — healthy ones are white; brown, mushy roots indicate rot. Cut off damaged roots, let dry, and replant in fresh gritty compost.
• Pearls dropping off and bare stems — Caused by insufficient light or direct sun scorching. Reposition to bright indirect light. Bare leggy stems can be laid on moist compost — nodes will root along the stem and produce new growth.
• Mealybugs — Mealybugs colonise the junctions between pearls and along stems. Treat promptly with a cotton swab dipped in 70% isopropyl alcohol or apply a neem oil solution. Repeat weekly for 3–4 weeks to break the lifecycle.

Propagation

Stem cuttings root readily. Cut a 5–10 cm stem section, remove a few pearls from the base to expose stem nodes, allow to callous for a day, then lay on or insert shallowly into moist gritty compost. Roots form within 1–3 weeks in warm, bright conditions. 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 Pearls is toxic to pets. Senecio rowleyanus is listed by the ASPCA as toxic to dogs and cats (and mildly toxic to humans). The plant contains pyrrolizidine alkaloids, which are hepatotoxic. Ingestion may cause vomiting, diarrhoea, lethargy, drooling, and in severe cases liver damage. Keep out of reach of pets and children. 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 Pearls deep-dive guides

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

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

Featured in these plant shortlists

String of Pearls qualifies for 5 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

String of Pearls is also known as String of Pearls, String of Beads, and Bead Plant.

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• All 6887 plant care guides in the Growli library