Vandell's Rock Jasmine (Silver Rock Jasmine) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Demands full sun to replicate high-alpine light intensity; under glass, position on the south-facing bench with maximum ventilation, as heat buildup without airflow can be damaging in summer. If your only bright window faces south, that's perfect for vandell's rock jasmine — same window any aroid would fry on.

Watering

Watering vandell's rock jasmine: very low — water from below, keep dry in winter. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water from below or at the base of the pot — never overhead — to keep the cushion and collar dry; reduce to near-zero watering from October through February to prevent rot.

Soil and pot

Vandell's Rock Jasmine grows best in lean, very sharply drained acidic gritty mix. Naturally grows on non-calcareous (silicate/igneous) rock; use a mix of 1 part peat-free ericaceous compost to 3 parts coarse grit or granite chips, with pH 3.5–6.5; lime-rich soils cause rapid decline. 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

Vandell's Rock Jasmine sits happiest at around Low (20–40% RH) humidity and -25 to 18°C (-13 to 64°F). Extremely intolerant of moisture on the cushion; best grown in an alpine house with the pots tilted or planted at an angle to shed rain, and with maximum ventilation at all times. 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 vandell's rock jasmine sparingly. No routine feeding required; a single very light top-dressing of slow-release, low-nitrogen alpine fertiliser in early spring is the maximum advised. 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 vandell's rock jasmine in the Growli community. Each is annotated with the most common cause so you know where to start.

• Crown rot from overhead moisture — The most common cause of failure; any water pooling in the cushion, especially at low temperatures, leads to irreversible Botrytis or Pythium rot — plant in vertical crevices or at an angle, and shelter from rain under glass.
• Aphids under glass — Cushion species grown in alpine houses are susceptible to root and shoot aphids; inspect regularly and treat with a systemic insecticide appropriate for ornamental use, avoiding wetting the cushion.

Propagation

Sow fresh seed in autumn in a well-drained acidic gritty mix in a cold frame — germination is slow and erratic. In late spring, carefully remove individual rosettes and root as cuttings in a warm, bright position; success rates are variable. 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

Vandell's Rock Jasmine is mildly toxic to pets. Androsace vandellii and the genus Androsace (Primulaceae) do not appear on the ASPCA Toxic or Non-Toxic Plant database. No known toxic principles have been documented, but in the absence of ASPCA confirmation the species is classified as mildly-toxic. 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.

Vandell's Rock Jasmine deep-dive guides

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

• Common vandell's rock jasmine problems & fixes
• Vandell's Rock Jasmine watering schedule
• Vandell's Rock Jasmine light requirements
• Best soil mix for vandell's rock jasmine
• Vandell's Rock Jasmine fertilizing guide
• When to repot vandell's rock jasmine
• How to propagate vandell's rock jasmine
• How to prune vandell's rock jasmine
• What's eating my vandell's rock jasmine?
• Vandell's Rock Jasmine growth rate & size
• Vandell's Rock Jasmine cold hardiness
• Vandell's Rock Jasmine temperature & humidity
• Is vandell's rock jasmine toxic to cats & dogs?
• Is vandell's rock jasmine toxic to cats?
• Is vandell's rock jasmine toxic to dogs?
• All 13 Androsace varieties
• Getting vandell's rock jasmine to bloom

Featured in these plant shortlists

Vandell's Rock Jasmine qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• 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 houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Vandell's Rock Jasmine is also known as Vandell's Rock Jasmine, Silver Rock Jasmine, and Silky Androsace.

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