Growli

Plant care

Karas Mountains Living Stones (Karasberg Living Stones) care

Lithops karasmontana

Also called Karasberg Living Stones, Stone Plant, Mimicry Plant.

RHS H1bUSDA 10–12Pet-safeIndoor 2–4 cm tall

Watering rhythm

Direct sun (at least 4-6 hours)

Only during the active growth window: water sparingly when new leaves are developing (roughly autumn to late spring). Withhold water entirely in summer dormancy.

Light

Direct sun (at least 4-6 hours)

Soil

Ultra-gritty, mineral-based succulent mix (80% inorganic: coarse sand, fine pumice, grit; 20% compost)

Humidity

20–35%

Temp

10–35°C

Pet safety

Pet-safe

Mature size

2–4 cm tall

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Requires maximum available direct sun — ideally a south-facing windowsill with 5+ hours of direct light daily. Insufficient light causes etiolation, failure to flower, and rot susceptibility. Supplement with a grow light in dull winter months. If your only bright window faces south, that's perfect for karas mountains living stones — same window any aroid would fry on.

Watering

Watering karas mountains living stones: only during the active growth window: water sparingly when new leaves are developing (roughly autumn to late spring). withhold water entirely in summer dormancy.. 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. The annual watering cycle is critical: dry rest through June–August (summer dormancy), begin light watering in September as buds appear, water sparingly through flowering and new leaf growth (Oct–May), then dry again from June. Overwatering in summer or during the resting and dividing phase causes the body to split and rot.

Soil and pot

Karas Mountains Living Stones grows best in ultra-gritty, mineral-based succulent mix (80% inorganic: coarse sand, fine pumice, grit; 20% compost). Replicates the near-pure quartz gravel of Namibian desert floors. Pure cactus compost retains too much moisture. Small, deep pots (to accommodate the taproot) with maximum drainage are essential. 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

Karas Mountains Living Stones sits happiest at around 20–35% humidity and 10–35°C (50–95°F). Demands very low humidity. Typical heated indoor environments are often suitable. High humidity without perfect airflow rapidly causes fungal rot. Never mist. If you keep the room above 10–35°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 karas mountains living stones sparingly. Fertiliser is rarely necessary and easy to overdo. If used, apply a very dilute, low-nitrogen cactus feed (e.g. 1-7-6) once a year in early autumn at the start of the active season. Never feed in summer. 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 karas mountains living stones in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Body splitting prematurelyAlmost always caused by watering at the wrong time. Follow the seasonal watering calendar strictly — no water during summer dormancy.
  • Wrinkled outer leavesNormal during the resting phase as the plant reabsorbs its old leaf pair. Do not water in response unless clearly in active growth season.
  • Rot at the baseResult of overwatering, poor drainage, or high humidity. Improve drainage immediately and allow soil to dry.
  • Failure to flowerInsufficient light or incorrect watering cycle. Ensure maximum sun and adhere to the dry summer rest period.
  • EtiolationStretched, tall bodies indicate insufficient light. Gradually increase sun exposure.

Companion plants

Karas Mountains Living Stones pairs well with Lithops optica, Conophytum bilobum, and Faucaria felina. 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

Division of multi-headed clumps in late spring (just before summer dormancy) is the most reliable method. Seeds are sown on mineral grit at 18–25°C; germination takes 1–3 weeks but seedlings are slow to develop into mature plants (3–5 years to first flower). 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

Karas Mountains Living Stones is pet-safe. Lithops are listed by the ASPCA as non-toxic to dogs and cats. While ingestion may cause mild gastrointestinal upset due to plant material, they are considered safe around pets. 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.

Karas Mountains Living Stones care — frequently asked questions

What is the common name for Lithops karasmontana?

Lithops karasmontana is most commonly called Karas Mountains Living Stones, but it is also known as Karasberg Living Stones, Stone Plant, Mimicry Plant. The names refer to the same species, so care instructions for Karas Mountains Living Stones apply identically to anything sold as Karasberg Living Stones.

How much light does karas mountains living stones need?

Karas Mountains Living Stones grows best in direct sun (at least 4-6 hours). Requires maximum available direct sun — ideally a south-facing windowsill with 5+ hours of direct light daily. Insufficient light causes etiolation, failure to flower, and rot susceptibility. Supplement with a grow light in dull winter months.

How often should I water karas mountains living stones?

Water karas mountains living stones only during the active growth window: water sparingly when new leaves are developing (roughly autumn to late spring). withhold water entirely in summer dormancy.. The annual watering cycle is critical: dry rest through June–August (summer dormancy), begin light watering in September as buds appear, water sparingly through flowering and new leaf growth (Oct–May), then dry again from June. Overwatering in summer or during the resting and dividing phase causes the body to split and rot. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is karas mountains living stones toxic to cats and dogs?

Karas Mountains Living Stones is pet-safe. Lithops are listed by the ASPCA as non-toxic to dogs and cats. While ingestion may cause mild gastrointestinal upset due to plant material, they are considered safe around pets.

What USDA hardiness zone does karas mountains living stones grow in?

Karas Mountains Living Stones is rated for USDA zone 10–12 and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Karas Mountains Living Stones deep-dive guides

Every aspect of karas mountains living stones care, each with its own calibrated guide:

Featured in these plant shortlists

Karas Mountains Living Stones qualifies for 10 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

  • Best pet-safe houseplantsHouseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
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  • Best pet-safe succulentsSucculents the ASPCA lists as non-toxic to cats and dogs — low-water greenery that is also safe around a curious pet.
  • Best small & tabletop houseplantsCompact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
  • Best houseplants for full sunHouseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
  • Best houseplants for a cool roomHouseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
  • Best cat-safe plantsHouseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
  • Best dog-safe plantsHouseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
  • Best small pet-safe plantsCompact, tabletop houseplants that are also ASPCA non-toxic to cats and dogs — safe greenery for a desk or shelf.
  • Browse all 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Karas Mountains Living Stones is also known as Karasberg Living Stones, Stone Plant, and Mimicry Plant.