Lithops comptonii — grey-green stone-like bodies in quartz gravel (AI reference)

AI-generated reference illustration (pending verified photo) · Photo: AI-generated reference

Species profile

Lithops comptonii

Compton's living stone

Origin: Western Northern Cape, South Africa (winter-rainfall region)
Flower: Yellow

Grey/GreenGreyIntermediate

How to identify it

Grey-green body with fine, dark window markings.
Yellow flowers; winter-rainfall habitat means a reversed cultivation cycle is sometimes used.

vs. lookalikes: Sometimes confused with L. herrei or L. divergens, also winter-rainfall species.

Care at a glance

Light	Very bright light — a south-facing window (in the northern hemisphere) with 4+ hours of direct sun, or a grow light delivering roughly 25,000–35,000 lux for at least eight hours a day. Too little light produces tall, soft, pale bodies.
Watering	Active growth happens in autumn and winter, not summer — water deeply but infrequently from October through March (northern hemisphere), and keep essentially dry through the hot months. Withhold water entirely during the spring molt.
Soil	Free-draining mineral mix — roughly 70–80% inorganic grit (pumice, lava rock, akadama, or coarse perlite) with 20–30% sieved low-nutrient organic matter. The substrate should drain in seconds and dry within 48 hours.
Dormancy	Hot, dry summer dormancy is the deepest rest. Keep dry from May through September; resume cautious watering in autumn as temperatures cool.
Temperature	Comfortable between 10 °C and 28 °C. Tolerates short excursions from 5 °C up to 35 °C in cultivation. Avoid sustained frost and prolonged heat above 32 °C.
Repotting	Every 3–4 years in early autumn, before the second growth window begins. Use a deep pot (at least 10 cm) to accommodate the long contractile roots.

Growth & flowering

Like every Lithops, Lithops comptonii runs on a single annual cycle: a winter-to-spring molt produces a fresh leaf pair, a short late-spring growth window rebuilds reserves, summer is a dry rest, and autumn brings a second growth window plus a single daisy-like yellow flower per mature head. Flowers open in the early afternoon, close at dusk, and repeat for a few days.

First flowering typically arrives at three to five years from seed. Established plants flower most years if the autumn watering window is clean — bone-dry through high summer, then deep waterings resumed in early autumn at roughly two- to three-week intervals. Skipping a year is normal; persistent non-flowering points to light, age, or a disrupted dormancy. For the genus-wide molting and watering walkthroughs, see our Guides.

Common problems

Stacked or 'tower' growth
Fix: Caused by watering during the molt. Stop water as soon as a new pair is visible in the cleft and resume only when the old leaves are completely papery and dry.
Etiolation — tall, soft, pale bodies
Fix: Not enough light. Move to the brightest window available or supplement with a grow light; increase intensity gradually over one to two weeks to avoid scorching.
Soft brown rot at the base
Fix: Overwatering combined with poor drainage or cool temperatures. Unpot, cut away rotted tissue with a sterile blade, callus the wound for several days, and replant in a much drier mineral mix.
Cracked windows after a deep watering
Fix: Usually a plant that dehydrated too far before watering resumed. Rehydrate with smaller, lighter waterings over several weeks rather than one big soak.
Mealybugs in the cleft or roots
Fix: Spot-treat with 70% isopropyl alcohol on a cotton bud every 5–7 days for three weeks. Inspect roots at the next repot — root mealybugs are common on Lithops and easy to miss.