How to Grow Lithops (Living Stones): Light, Water & Dormancy

Lithops, the so-called “living stones,” are among the most rewarding and most misunderstood succulents you can keep. Native to the arid scrublands of South Africa and Namibia, they spend their lives mimicking the pebbles around them, with two fused leaves that store water through brutal dry seasons. Kill them and it is almost always for the same reason: too much water at the wrong time. Get the watering rhythm right and a single plant can live for decades, slowly forming a clump and surprising you with a daisy-like flower each autumn. This guide walks you through light, soil, the all-important seasonal watering cycle, dormancy, the annual leaf split, and the handful of problems that trip people up.

Understanding the Lithops Growth Cycle

You cannot water lithops on a calendar like a houseplant; you water them according to where they are in their life cycle. In the Northern Hemisphere that cycle generally runs like this: plants flower in early-to-mid autumn (September–November), rest through winter, push a new body in late winter to early spring as the old leaves shrivel, grow actively in spring, then go dormant again through the hottest part of summer. Once you can read which phase your plant is in, watering becomes intuitive rather than guesswork.

The single most important rule: when the old leaves are wrinkling and the new body is emerging from between them in late winter and spring, the plant is living off the moisture stored in those old leaves. Watering during this window causes the plant to keep the old leaves plump, stack a second new pair, or simply rot. Let the old leaves dry to papery husks before you resume watering.

Light: Bright, Direct, and Plenty of It

Lithops are full-sun desert plants and they need serious light to stay compact and colorful. Indoors, give them the brightest spot you have — an unobstructed south-facing window is the gold standard, and even then plants often stretch in winter when the sun is low. Aim for at least 4–5 hours of direct sun a day. If the bodies start to elongate, lean, or lose their patterning and turn a flat dull green, they are not getting enough light.

If a sunny window isn’t available, a small LED grow light positioned a few inches above the plants for 10–12 hours a day works well and keeps them tight through winter. When moving plants from low light into strong sun, harden them off gradually over a week or two — lithops can sunburn, showing up as tan or reddish scorched patches on the top surface that never heal. Outdoors in hot climates, a touch of afternoon shade in peak summer prevents scorching.

Soil and Containers

Drainage is everything. A standard “cactus and succulent” bagged mix is usually still too rich and water-retentive for lithops on its own. Cut it heavily with mineral grit so the final blend is at least half — ideally 60–70% — inorganic material. Pumice, coarse perlite, crushed lava, decomposed granite, and coarse (not play) sand all work. The organic fraction should be minimal: a little coir or a pinch of standard succulent mix is plenty. The goal is a medium that wets thoroughly and then dries out completely within a few days.

Lithops have a surprisingly long taproot, so a slightly deeper pot suits them better than a shallow one — a 3.5–4 inch deep pot is good for a few plants. Always use a container with a drainage hole; a pot without one is a death sentence for these plants. Terracotta breathes and dries faster, which is forgiving, though glazed and plastic pots are fine if you adjust watering. A top dressing of small gravel or grit keeps the necks dry and shows off the plants. If you grow other dry-loving succulents, the same gritty approach that suits a crown of thorns plant applies here, only more extreme.

Watering: The Seasonal Schedule That Keeps Them Alive

Forget “a little every week.” Lithops are watered in deep soakings spaced far apart, and only during their two growth windows. Here is the rhythm in the Northern Hemisphere:

Autumn (active growth and flowering)

From late summer into fall, as temperatures ease, lithops wake up and many will flower. This is one of the two watering seasons. Water thoroughly until it runs from the drainage hole, then wait until the soil is bone dry and the bodies show the faintest softening or slight wrinkle before watering again — often 10–21 days apart depending on heat and pot size. After flowering, taper off as winter approaches.

Winter (rest — keep dry)

Through the coldest, darkest months, lithops are dormant and forming their new bodies internally. Withhold water almost entirely. If a plant looks dangerously shriveled and the room is warm, a tiny sip is acceptable, but when in doubt, do nothing. Cold plus wet soil rots them fast. Keep them above about 41°F (5°C).

Late winter to spring (the leaf split)

As the new pair of leaves pushes up and the old pair wrinkles and dries, keep the plant dry. Let the old leaves fully exhaust themselves into papery shells. Only once they are dry and the new body is firm and established do you resume careful spring watering, following the same soak-and-dry approach as autumn.

Summer (heat dormancy — keep dry)

In the hottest part of summer, lithops shut down again. Stop watering. A very occasional light misting or a small splash on the soil edge during prolonged extreme heat can prevent the roots from completely desiccating, but most growers simply keep them dry until temperatures fall in late summer. The biggest killer of indoor lithops is a well-meaning weekly summer watering.

The Annual Leaf Split Explained

Once a year, usually late winter into spring, each lithops body splits and a brand-new pair of leaves emerges from the center, drawing water and nutrients from the old pair. The old leaves shrink, wrinkle, and dry into thin sheaths that eventually fall away or can be gently peeled once fully papery. This is normal and healthy — do not panic and water. A plant that gets watered during the split often produces an extra pair of leaves (it “doubles up”), which weakens it over time and creates an unnatural clumping. Patience here is the difference between a thriving plant and a stressed one. Mature, well-grown plants will naturally divide into clumps of multiple heads over several years without intervention.

Feeding, Repotting, and Propagation

Lithops need very little feeding. They evolved in poor mineral soils, so a heavy hand with fertilizer causes soft, bloated, rot-prone growth. At most, give a single dose of a dilute (quarter-strength) low-nitrogen succulent fertilizer once during the autumn growth period. Skip feeding altogether and the plants will be perfectly happy.

Repot only every few years, ideally in autumn at the start of growth, and let the plant settle dry for a week before its first watering to give any disturbed roots time to callus. Propagation is easiest from seed: sow the fine seed on top of gritty mix in autumn, keep lightly moist and warm until germination, then gradually transition seedlings to the soak-and-dry routine over their first year. Seed-grown lithops are slow but very rewarding, often taking two to three years to reach flowering size. Division of established clumps is possible but riskier, since lithops resent root disturbance.

Common Problems and How to Fix Them

Rot and mush. A body that turns yellow, translucent, or collapses into mush is rotting, almost always from water during dormancy or in cold conditions. There is no saving a fully rotted plant; the lesson is to water less and only in season. Improve drainage and review your timing.

Stretching and pale color. Elongated, leaning bodies with washed-out patterning mean too little light. Move to brighter conditions or add a grow light; the next cycle’s new leaves will grow more compact.

Doubling up. A plant that produces a second pair of leaves before finishing the first was watered during the split. Resume the dry-during-split rule next year.

Sunburn. Tan or reddish scorched patches follow a sudden jump in light intensity. Harden plants off gradually and provide light afternoon shade in extreme summer heat.

Pests. Mealybugs and root mealybugs occasionally appear; treat with a cotton swab of diluted isopropyl alcohol or a systemic suited to succulents, and inspect roots at repotting. For more finicky bloomers that share a windowsill, our notes on growing cyclamen and the broader Plants & Flowers hub cover related dormancy and watering pitfalls.