Lithops (Lithops spp.) is a houseplant that breaks almost every houseplant rule, and this guide covers exactly how to keep it healthy: light, water, soil, temperature, repotting and the problems that show up when something is off. It needs far less water than any other plant in this series — almost none in winter — and it will die faster from a single overwatering than from a year of neglect. Understand its yearly cycle, give it sun and a gritty mix, and it is a fascinating, long-lived plant.
Lithops, often called living stones, are among the strangest houseplants you can grow: each plant is a pair of thick, fused leaves that look exactly like a pebble, in speckled greys, browns and greens. They evolved to hide from grazing animals in the deserts of southern Africa, and they flower from the split between the two leaves, usually in autumn, with a daisy-like bloom. They are small, slow and almost entirely self-sufficient — the plant you water least in the whole collection.
Lithops at a glance
| Care factor | What this plant needs |
|---|---|
| Botanical name | Lithops spp. |
| Light | bright direct |
| Water | every 3–4 weeks; water sparingly, almost never in winter |
| Humidity | low |
| Temperature | 60–80°F |
| Repotting | every 3–4 years |
| Pet safety | non-toxic to cats and dogs |
Light
Give your lithops bright direct light. A sunny south- or west-facing window is ideal, with several hours of direct sun each day — this is a plant that evolved in open, sunny places, and it needs that light to stay compact and keep its colour. If your plant has been in shade, move it into direct sun gradually over a week or two, so the leaves can adjust without scorching. Too little light is the most common problem: the plant stretches, the gaps between leaves widen, and colours fade. If the stems start reaching towards the window, the plant is telling you it needs a brighter spot. Our grow-light calculator can help work out whether your window gives enough light, especially in winter when the days are short.
Watering
Water every 3–4 weeks; water sparingly, almost never in winter. That is the whole rule, and it is stricter than for any other plant in this series: lithops should be watered only sparingly during the growing season and almost never in winter, especially while the old leaves are splitting and the new pair is growing through. When you do water, water lightly — a small amount around the base of the plant — and let the soil dry out completely before you even think about watering again. Overwatering is almost always fatal: the leaves swell, split and turn to mush, and there is no recovery. If you are unsure, do not water. Lithops have a yearly cycle that must be respected: each year the old pair of leaves shrivels and a new pair grows up through the split, feeding on the old leaves. During this splitting period, and through winter, the plant should receive almost no water at all — watering then is the fastest way to kill it. Water only sparingly during the growing season, when the new leaves are plump and actively growing. Our watering calculator can help you plan a sparse schedule, and the watering schedule generator can remind you to check the plant rather than water it on autopilot.
Humidity and temperature
Lithops prefers low humidity and temperatures of 60–80°F. Most homes are well within that temperature range, so temperature is rarely a problem indoors — the things to watch are cold draughts in winter and cold windows that chill the plant overnight. Keep it away from both. Low humidity is good news for most homes: this plant does not need a humidifier, a pebble tray or misting, and in fact it prefers dry air. Good airflow helps too, especially in winter, because still, damp air around the leaves encourages rot. Our humidity and temperature checker can tell you whether your room suits this plant.
Soil and potting
Lithops needs a gritty, free-draining mix — standard potting soil on its own holds too much water and compacts over time. Use a cactus or succulent mix, or mix standard potting soil with perlite or pumice so air can reach the roots, and always use a pot with drainage holes. Without drainage, water has nowhere to go and root rot follows, which is the fastest way to kill this plant. Our potting-mix calculator can work out the parts for a homemade mix for your pot size, and a shallow pot often suits this plant better than a deep one, because its roots are shallow and a deep pot holds wet soil the roots cannot reach.
Repotting
Repot every 3–4 years, or sooner if roots are circling the drainage holes or pushing out of the top of the pot. Move up only one pot size — a pot that is too big holds wet soil the roots cannot use. Spring is the best time to repot, when the plant is about to grow, and fresh mix gives the roots a new supply of air and nutrients. Handle the plant gently while repotting, and let it settle for a few days before watering again. Our repotting calculator can help you work out the next pot size and how much fresh mix you will need.
Feeding
Feed during the growing season, in spring and summer, with a balanced liquid houseplant fertiliser at half strength, and do not feed in autumn and winter when the plant is barely growing. Always follow the directions on the label — more fertiliser is not better, and excess salts build up in the soil and burn the roots, which often shows up as brown leaf tips. A light feeding once or twice in the growing season is plenty for a slow-growing succulent like this one, and a plant that is not growing does not need feeding at all.
Propagation
Propagate lithops by division or from seed. A mature clump can be divided carefully when repotting, making sure each division has roots of its own. Growing from seed is possible but very slow — seedlings take years to look like adult plants — so division is the practical method for most growers.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Sunburn spots | Sudden harsh direct sun | Move the plant out of harsh midday sun or away from cold draughts, and acclimatise it gradually to brighter light. Damaged areas will not heal, but new growth should be healthy. |
| Mushy leaves | Overwatering / root rot | Let the soil dry out fully, improve drainage, and remove any soft, rotted growth. Water less often and only when the soil is dry. |
| Stretching (etiolation) | Too little light | Move the plant to a brighter spot gradually, and prune back stretched growth if needed. New growth should come in compact. |
Sunburn spots
Likely cause: sudden harsh direct sun. Move the plant out of harsh midday sun or away from cold draughts, and acclimatise it gradually to brighter light. Damaged areas will not heal, but new growth should be healthy.
Mushy leaves
Likely cause: overwatering / root rot. Let the soil dry out fully, improve drainage, and remove any soft, rotted growth. Water less often and only when the soil is dry.
Stretching (etiolation)
Likely cause: too little light. Move the plant to a brighter spot gradually, and prune back stretched growth if needed. New growth should come in compact.
Frequently asked questions
How often should I water lithops?
Water every 3–4 weeks; water sparingly, almost never in winter. Check the soil rather than watering on a calendar: if the soil is still damp, wait. Water thoroughly when it is time, let the excess drain away completely, and never let the plant sit in standing water.
What light does lithops need?
It needs bright direct light. See the light section above for the best window position. Too little light leads to stretching and pale, weak growth, while sudden harsh sun can scorch the leaves — move the plant into brighter light gradually.
Is lithops safe for cats and dogs?
According to the data used for this guide, lithops is non-toxic to cats and dogs. Keep it out of reach of curious pets if the data says it is toxic, and contact a vet if your pet has eaten any of it. If it is listed as non-toxic, it is still best kept out of reach so pets do not damage the plant.
Why does my lithops have sunburn spots?
The most likely cause is sudden harsh direct sun. Check the common problems table above and fix that cause first before changing anything else — most problems on this plant come back to light or watering.
When should I repot lithops?
Repot every 3–4 years, in spring, or sooner if roots are circling the drainage holes. Move up one pot size only and use a fresh, free-draining mix. Browse the houseplants hub for more care guides in this series, or try the repotting calculator to work out the next pot size.
Related guides
Browse the full houseplants hub for more species care guides, and see the tools hub for calculators that help with watering, light and repotting.