Soil & potting mix
Best soil for Living Stones (Lithops karasmontana)
Also called Karas Mountains Living Stone, Flowering Stones.
More about living stones
About Living Stones
Lithops karasmontana · also called Karas Mountains Living Stone, Flowering Stones · houseplant
Lithops karasmontana is a mimicry succulent from Namibia's Karas Mountains, its paired fused leaves disguised as patterned pebbles. Each plant is mostly a single pair of leaves with a fissure that splits to reveal a daisy-like white flower in autumn. It demands extremely sparing water on a strict seasonal cycle and the grittiest possible drainage to thrive.
Preferred mix: Mineral, extremely free-draining gritty mix
Watch for — Soft rot: A translucent, mushy, collapsing body signals overwatering in a too-rich or poorly draining mix. Cut watering, switch to a mineral grit mix, and keep airflow high.
Why living stones needs this mix
Living Stones is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Living Stones is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
- A little perlite or bark stops ordinary compost compacting into an airless block over time, which is the slow, common cause of decline.
- It is not fussy about pH or special ingredients; getting the air-to-moisture balance right is what matters.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons living stones struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates living stones's roots.
- A pure peat mix that dries to a hard, water-repelling block is hard to re-wet and stresses the plant.
- No drainage hole turns even a good mix into a stagnant, root-rotting sump.
Reusing tired, compacted old compost or skipping the perlite. A free-draining mix in a pot with a hole solves most "why is it struggling" cases for living stones.
pH — does it matter for living stones?
Living Stones is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A decent bagged houseplant compost works for living stones as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Drainage and the pot
A pot with a drainage hole and a saucer you empty after watering is all living stones needs — the free-draining mix does the rest.
Refresh living stones's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. When the time comes, our repotting guide for living stones covers the timing and technique step by step.
Living Stones soil — frequently asked questions
What is the best soil mix for living stones?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Living Stones is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
Can I use normal potting soil for living stones?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates living stones's roots. A decent bagged houseplant compost works for living stones as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Does living stones need a special pH?
Living Stones is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
Should I buy a bagged mix or make my own for living stones?
A decent bagged houseplant compost works for living stones as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
How often should I refresh the soil for living stones?
Refresh living stones's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. A pot with a drainage hole and a saucer you empty after watering is all living stones needs — the free-draining mix does the rest.
Keep reading
- Living Stones care — the full brief (light, water, humidity, problems, pet safety)
- How often to water living stones — the schedule the mix feeds into
- Repotting living stones — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
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- All 1284 soil and potting-mix guides in the Growli library