Rock Jasmine (Sarmentose Androsace) care

Light

Rock Jasmine needs sun on the leaves, not just bright ambient room light. Requires full sun for at least 6 hours per day. Good light intensity is necessary for dense, compact growth and prolific flowering. A slight tolerance of afternoon dappled shade exists in hot climates, but heavy shade causes weak, sprawling mats with few flowers. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water rock jasmine water moderately in spring and summer; reduce in autumn and winter. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. More tolerant of some moisture than other Androsace species thanks to its Himalayan origin with monsoon summers, but still requires well-drained conditions. Keep soil evenly moist but never waterlogged during active growth; reduce watering significantly in winter to prevent crown rot.

Soil and pot

Rock Jasmine grows best in gritty, well-drained loam or alpine mix. A mix of equal parts loam, leaf mould, and coarse grit suits this species well. It tolerates slightly more moisture-retentive soil than high-altitude Androsace species but still needs free drainage. Neutral to slightly acidic pH (5.5–7.0) is preferred. 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

Rock Jasmine sits happiest at around Low to moderate, 30–55% RH humidity and -20°C to 22°C (-4°F to 72°F). Tolerates moderate humidity better than many Androsace species, reflecting its Himalayan monsoon habitat. However, stagnant humid air in winter or wet conditions at the crown cause rot; ensure good air circulation year-round. If you keep the room above 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 rock jasmine sparingly. Feed lightly with a balanced, low-nitrogen fertiliser once in early spring. Avoid overfeeding, which promotes lush, disease-prone growth at the expense of flowers. A grit top-dressing in lieu of heavy fertilising helps maintain soil structure. 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 rock jasmine in the Growli community. Each is annotated with the most common cause so you know where to start.

• Crown rot in winter wet — The hairy rosettes trap moisture in cold, wet winters, leading to fungal rot. Apply a dry gravel mulch under the foliage, ensure sharp drainage, and consider overhead protection with a pane of glass in persistently wet climates.
• Spider mites in hot, dry spells — Fine webbing and stippled, bronzed foliage signal spider mite attack during hot, dry summers. Improve air circulation, mist the undersides of foliage with water, and treat with a miticide or insecticidal soap if infestation is heavy.
• Stolons becoming invasive — Vigorous runners can swamp smaller alpines in a trough or raised bed. Trim back stolons annually in late summer to keep the plant within bounds and to encourage regeneration of fresh, floriferous rosettes.

Propagation

Detach stolons bearing rooted daughter rosettes in late spring or summer and pot into gritty alpine compost. Seed can be sown fresh in autumn in a cold frame; germination is improved by cold stratification and typically occurs in spring. Division of established mats in early spring is straightforward. 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

Rock Jasmine is pet-safe. Androsace sarmentosa is not individually listed by ASPCA. The genus Androsace (family Primulaceae) has no documented toxic principles and is generally considered non-toxic to dogs and cats based on family characteristics and available horticultural literature. 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.

Rock Jasmine deep-dive guides

Every aspect of rock jasmine care, each with its own calibrated guide:

• Common rock jasmine problems & fixes
• Rock Jasmine watering schedule
• Rock Jasmine light requirements
• Best soil mix for rock jasmine
• Rock Jasmine fertilizing guide
• When to repot rock jasmine
• How to propagate rock jasmine
• How to prune rock jasmine
• What's eating my rock jasmine?
• Rock Jasmine growth rate & size
• Rock Jasmine cold hardiness
• Rock Jasmine temperature & humidity
• Is rock jasmine toxic to cats & dogs?
• Is rock jasmine toxic to cats?
• Is rock jasmine toxic to dogs?
• All 7 Androsace varieties
• Getting rock jasmine to bloom

Featured in these plant shortlists

Rock Jasmine qualifies for 7 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe flowering plants — Flowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Rock Jasmine is also commonly called Rock Jasmine or Sarmentose Androsace.

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