Faucaria lupina (wolf jaws) care

Light

Most houseplants will scorch where faucaria lupina thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Wants 4-6 hours of direct sun. A bright south or west window keeps the 'jaws' compact and well-coloured; in low light the leaves stretch and the teeth lose definition. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for when soil is fully dry, mainly in spring and autumn growth; reduce in summer and winter for faucaria lupina, 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. Water thoroughly then let the mix dry out completely. Faucaria grows in the cooler seasons, so ease off during the hottest summer weeks and keep nearly dry in cold winter spells. Soggy roots rot quickly.

Soil and pot

Faucaria lupina grows best in gritty, fast-draining succulent mix. Standard cactus mix amended with around 30-50% pumice, perlite or coarse sand. Free drainage and a pot with holes are essential to avoid rot. 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

Faucaria lupina sits happiest at around 30-50% humidity and 10-27°C (50-80°F). Happy in dry household air with good airflow. Excess humidity in stagnant conditions can encourage rot and fungal spots. If you keep the room above 10 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 faucaria lupina sparingly. Feed once or twice during active spring and autumn growth with a dilute, low-nitrogen cactus fertiliser at half strength. Avoid feeding during summer heat dormancy and winter rest. 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 faucaria lupina in the Growli community. Each is annotated with the most common cause so you know where to start.

• Root rot from overwatering — Most frequent issue, worsened by watering in summer dormancy or in heavy soil. Let the mix dry fully and use a gritty substrate.
• Etiolation — Low light stretches the leaves and softens the toothed margins. Move to a brighter window or add a grow light.
• Shrivelled, soft leaves — Underwatering during the active cool-season growth causes wrinkling; a thorough soak once soil is dry restores plumpness.
• Mealybugs — Cluster between the paired leaves. Treat with 70% isopropyl alcohol and repeat until eliminated.

Propagation

Propagate by division of offsets in spring or autumn, by leaf-pair cuttings allowed to callus, or from seed. Let cut surfaces dry before potting into gritty mix. 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

Faucaria lupina is mildly toxic to pets. Faucaria is not individually listed in the ASPCA Toxic and Non-Toxic Plants database, so its status is unconfirmed; treat with caution and verify with a vet. Hobbyist sources commonly describe Faucaria (tiger/wolf jaws) as non-toxic, but because the ASPCA does not list it, a verified pet-safe claim cannot be made here. 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.

Faucaria lupina deep-dive guides

Every aspect of faucaria lupina care, each with its own calibrated guide:

• Faucaria lupina watering schedule
• Faucaria lupina light requirements
• Best soil mix for faucaria lupina
• Faucaria lupina fertilizing guide
• When to repot faucaria lupina
• How to propagate faucaria lupina
• Faucaria lupina growth rate & size
• Faucaria lupina cold hardiness
• Faucaria lupina temperature & humidity
• Is faucaria lupina toxic to cats & dogs?
• Is faucaria lupina toxic to cats?
• Is faucaria lupina toxic to dogs?

Featured in these plant shortlists

Faucaria lupina qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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 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

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Faucaria lupina is also commonly called wolf jaws.

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