Cat's Jaws (Tiger Jaws Faucaria) care

Light

Cat's Jaws needs sun on the leaves, not just bright ambient room light. Needs at least 4–6 hours of direct sun daily for compact growth and reliable flowering. A south-facing windowsill is ideal. Insufficient light causes the characteristic toothy leaf form to elongate and flatten. 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 cat's jaws when the soil is completely dry, roughly every 10–14 days in spring and summer; reduce to once a month or less in winter. Succulent-style plants store water in stem and leaf tissue — they'd rather be slightly thirsty than slightly soggy, and the most common way to kill one is to water it on a fixed weekly calendar instead of by feel. Water thoroughly at the base and allow to drain completely. Reduce watering from late autumn through winter when the plant is dormant. Overwatering is the principal cause of failure.

Soil and pot

Cat's Jaws grows best in free-draining cactus or succulent mix with added coarse grit or perlite. A 60:40 blend of cactus compost and perlite suits this species well. Good drainage replicates its native rocky Karoo habitat. Use small terracotta pots to reduce moisture retention. 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

Cat's Jaws sits happiest at around 20–40% humidity and 5–30°C (41–86°F). Prefers low humidity consistent with semi-arid conditions. Tolerates average household humidity but avoid misting or placing near humidifiers. If you keep the room above 5–30°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 cat's jaws sparingly. Apply a dilute low-nitrogen cactus fertiliser (e.g. 5-10-10 at half strength) once in spring and again in early summer. Do not feed in autumn and winter. Overfeeding causes lax, atypical growth. 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 cat's jaws in the Growli community. Each is annotated with the most common cause so you know where to start.

• Root rot — Most commonly caused by overwatering, especially in winter dormancy. Let soil dry completely between waterings.
• Failure to flower — Insufficient light or warmth in summer prevents bud set. Ensure maximum sun exposure during summer and a cool, dry winter rest.
• Mealybugs — Hide in the leaf crevices. Treat with isopropyl alcohol applied with a cotton bud or a diluted insecticidal soap spray.
• Elongated, flat leaves — Sign of etiolation from too little light. Move to a brighter position gradually.
• Wrinkled leaves in summer — Indicates the plant needs water. Water thoroughly and the leaves should plump up within a day or two.

Companion plants

Cat's Jaws pairs well with Lithops karasmontana, Conophytum bilobum, and Haworthia cooperi. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Divide established clumps in spring — separate rooted rosettes and pot individually in dry gritty mix. Seeds can be sown on the surface of moist fine grit at 18–22°C and germinate in 2–4 weeks. 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

Cat's Jaws is mildly toxic to pets. Faucaria felina is not individually listed by the ASPCA. As a member of the Aizoaceae (mesemb) family, specific toxicity data is limited. Some Aizoaceae contain oxalic acid compounds. Treat as mildly toxic as a precaution and 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.

Cat's Jaws deep-dive guides

Every aspect of cat's jaws care, each with its own calibrated guide:

• Common cat's jaws problems & fixes
• Cat's Jaws watering schedule
• Cat's Jaws light requirements
• Best soil mix for cat's jaws
• Cat's Jaws fertilizing guide
• When to repot cat's jaws
• How to propagate cat's jaws
• How to prune cat's jaws
• What's eating my cat's jaws?
• Cat's Jaws growth rate & size
• Cat's Jaws cold hardiness
• Cat's Jaws temperature & humidity
• Is cat's jaws toxic to cats & dogs?
• Is cat's jaws toxic to cats?
• Is cat's jaws toxic to dogs?
• All 10 Faucaria varieties

Featured in these plant shortlists

Cat's Jaws qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• 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 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Cat's Jaws is also known as Tiger Jaws Faucaria, Cat Jaws Succulent, and Faucaria.

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