Curio rowleyanus · also called String of beads, Rosary plant, Senecio rowleyanus, String-of-pearls
⚠ Toxic to pets
Toxic to cats and/or dogs — keep out of reach.
A striking trailing succulent whose thread-like stems are strung with round, pea-sized 'pearls,' Curio rowleyanus is a coveted hanging plant. The spherical leaves are an adaptation to reduce water loss while letting light in through a translucent window — and it is mildly toxic to pets.
ℹ️
Educational only. KinStation content is reviewed by licensed veterinarians but cannot replace an in-person exam. Always consult a licensed veterinarian or board-certified specialist for diagnosis, treatment, or any decision affecting your pet's health.
Quick facts
Category
Succulents & Cacti
Family
Asteraceae
Native origin
Dry regions of southwestern Africa (South Africa and Namibia)
Care difficulty
Intermediate
Light
Bright indirect
Pet toxicity
Toxic to pets
Light
String of pearls wants bright light, ideally bright indirect with perhaps a little gentle morning sun; intense hot sun can shrivel and scorch the delicate pearls. Too little light leads to sparse strands and spaced-out, shrinking beads. A bright window where the strands trail in good light, out of harsh midday rays, is ideal.
Water
Water thoroughly, then let the soil dry out almost completely before watering again — the pearls store water and the plant is very prone to rot if kept moist. Pearls that are plump and firm mean it is well-watered; shriveling pearls signal thirst. Reduce watering in winter, and never let the pot sit in water.
Soil & potting
Use a gritty, fast-draining cactus/succulent mix with extra perlite or pumice in a pot with drainage. The roots are shallow and fine, so a shallow container suits it and a deep pot of slow-drying soil invites rot. Refresh the mix occasionally, handling the brittle strands gently.
Environment — humidity, temperature, placement
It prefers warm, dry conditions and ordinary household air, and is frost-tender — keep it above roughly 50F (10C). High humidity and stagnant air encourage rot, so good airflow helps. Hang or set it where the fragile strands can trail undisturbed, since they break easily.
Propagation
Very easy from stem cuttings: lay a few inches of strand on top of (or lightly pressed into) dry succulent mix, and the nodes along the stem root readily — you can even coil a long strand on the soil surface to make a fuller pot. Let cuttings callus briefly first and water lightly until rooted. Broken strands are ideal propagation material.
Toxicity detail
Toxic (mildly) to cats and dogs. String of pearls (Curio rowleyanus, formerly Senecio rowleyanus) is considered toxic to pets; many references rate it mildly toxic, with ingestion causing drooling, vomiting, diarrhea, and lethargy, and the sap can also irritate skin. (It is not on every ASPCA species page by name, but Senecio/Curio species are flagged as hazardous and pet-poison resources list string of pearls as toxic.) Keep it out of reach of pets and contact a veterinarian if eaten. Source: ASPCA / pet poison-control toxic-plant guidance for Senecio species.
Origin & history
Native to the arid southwest of Africa, this trailing succulent was long classified as Senecio rowleyanus — named after the British succulent expert Gordon Rowley — and has since been moved to the genus Curio. Its spherical leaves are a textbook example of a water-saving adaptation: the round shape minimizes surface area, while a translucent 'window' stripe lets sunlight reach the photosynthetic interior. It became a sought-after houseplant during the modern succulent boom.
Growth stages
How this plant changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Seed
Most plants begin as a seed (or spore in ferns) — a dormant package holding the embryo and a food reserve within a protective coat. Given moisture, warmth, and sometimes light, the seed breaks dormancy and germinates.
Photo coming soon
Seedling
The seedling emerges with a root and its first leaves (cotyledons), then true leaves. It is tender and shallow-rooted, dependent on steady moisture and light as it establishes the beginnings of stem and root systems.
Photo coming soon
Vegetative growth
In the vegetative phase the plant focuses on growing roots, stems, and foliage, building the size and structure it needs before flowering. This is the main period of leafing out and, for many houseplants, the stage at which they are grown and propagated.
Mature / Flowering
A mature plant reaches its full habit and, when conditions and age allow, flowers and sets seed (or, for foliage plants, simply attains its full adult size and form). This is the stage shown in most reference photos.
Problems & solutions
Each problem lists a proven fix (horticulture / extension-backed) and, where useful, an anecdotal remedy from the grower community — clearly labeled so you can judge for yourself.
Shriveled, deflating pearls
mild
Symptoms:The round leaves lose their plumpness, wrinkle, and shrink, and strands look thin.
Likely cause:Usually underwatering or a long-dry rootball, as the pearls draw down their stored water. It can also follow root damage from past overwatering, which stops the plant taking up moisture.
✓ Proven fix
Water thoroughly; healthy plants re-plump their pearls within a day or two. If pearls stay shriveled in moist soil, check for rotted roots and re-root healthy strand cuttings to start over.
◇ Anecdotal remedy — grower lore, unverified
Growers use pearl firmness as a built-in moisture meter — watering only when the beads start to soften — and credit it for avoiding both drought and rot.
Mushy, rotting strands at the soil line
severe
Symptoms:Strands turn soft, yellow-brown, and mushy, especially where they meet the soil, and the plant thins from the base.
Likely cause:Overwatering, a deep pot of slow-drying soil, or poor airflow keeping the fine shallow roots and lower strands wet.
✓ Proven fix
Let the mix dry almost fully between waterings, use a shallow pot of gritty fast-draining soil, and improve airflow. Snip off rotted sections and re-root healthy strand tips on fresh dry mix to rebuild the plant.
◇ Anecdotal remedy — grower lore, unverified
A popular rescue is to harvest all the still-firm pearls strands, lay them on fresh dry mix in a shallow pot, and start an entirely new plant rather than fighting rot in the old one.
Bald, leggy strands with widely spaced pearls
mild
Symptoms:Strands grow long and bare with big gaps between small pearls, and the pot looks sparse on top.
Likely cause:Too little light, causing stretched growth, and sometimes natural thinning of older strands over time.
✓ Proven fix
Move it to brighter (bright indirect) light. Thicken the pot by coiling existing strands onto the soil surface or laying cuttings down to root, which fills in the bare crown over a season.
◇ Anecdotal remedy — grower lore, unverified
Many growers routinely 'top up' their string of pearls by tucking trimmed strands back into the pot, treating a thinning plant as a chance to make it fuller than ever.
Anecdotes & grower lore
Community experience and cultural notes — not horticultural guarantees. Conditions vary by home; treat these as colour, not prescriptions.
String of pearls has a reputation among houseplant enthusiasts as 'finicky but worth it' — a status symbol that rewards the grower who finally cracks its watering. Owners trade the trick of coiling broken strands back onto the soil to thicken a thinning pot, turning the plant's fragility into an advantage. Many also delight in its surprising little brush-like white flowers, which are widely said to smell of cinnamon.
Reviewed and signed off by: KinStation Editorial — pre-launch draft (pending horticulture review) on 2026-05-28
