Soil & potting mix
Best soil for Lehmann's Iceplant (Delosperma lehmannii)
Also called Lehmann's Iceplant, Ice Plant, Cube-leafed Ice Plant.
More about lehmann's iceplant
About Lehmann's Iceplant
Delosperma lehmannii · also called Lehmann's Iceplant, Ice Plant · flowering
Delosperma lehmannii (syn. Corpuscularia lehmannii) is a compact South African succulent with distinctive upright, grey-green leaves arranged in opposing pairs. Bright yellow to orange daisy-like flowers appear in spring and summer. Tender in cold climates, it excels as a container plant or indoor succulent. It is highly drought-tolerant and needs minimal care once established in well-draining soil.
Preferred mix: Sandy, gritty, well-draining cactus or succulent mix
Watch for — Root rot from overwatering: Mushy stems at the base signal root rot, typically from overwatering or poor drainage. Allow soil to dry fully between waterings and use a pot with ample drainage holes.
Why lehmann's iceplant needs this mix
Lehmann's Iceplant stores water in its leaves and stems, so it wants a free-draining, gritty mix that dries out fully between waterings — not a moisture-holding one.
- Lehmann's Iceplant carries its own water supply in its thick tissue, so the soil's job is to drain fast and then get out of the way.
- Its roots are adapted to short wet spells followed by long dry ones — a mix that stays damp removes the dry phase they depend on.
- A gritty mix also keeps the plant compact and well-coloured rather than soft, leggy and prone to collapse.
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 lehmann's iceplant struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Standard potting compost on its own stays wet far too long for lehmann's iceplant; the lower leaves and stem base go soft and translucent first.
- Big plastic pots full of dense mix hold a wet core long after the surface looks dry — that hidden wet zone is where rot starts.
- Anything sold as "moisture control" is the opposite of what this plant wants.
Treating lehmann's iceplant like a leafy houseplant and using plain compost. It needs at least half its volume as grit, perlite or pumice to survive long term.
pH — does it matter for lehmann's iceplant?
pH is not a concern for lehmann's iceplant — anything from mildly acidic to neutral (6.0-7.0) works. Get the drainage right and pH looks after itself.
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 good bagged "cactus and succulent" mix works for lehmann's iceplant if you add roughly 30-50% extra perlite or grit. Mixing your own from the ratio above gives you full control of how fast it dries.
Drainage and the pot
Use a pot with a drainage hole and empty the saucer within minutes of watering. Terracotta is more forgiving than glazed or plastic because it dries the rootball faster.
This mix decomposes slowly, so lehmann's iceplant only needs repotting every 2-3 years — mainly to refresh the grit and check the roots are firm and pale. When the time comes, our repotting guide for lehmann's iceplant covers the timing and technique step by step.
Lehmann's Iceplant soil — frequently asked questions
What is the best soil mix for lehmann's iceplant?
2 parts standard cactus or succulent compost : 1 part perlite or pumice : 1 part coarse grit or coarse sand. Lehmann's Iceplant carries its own water supply in its thick tissue, so the soil's job is to drain fast and then get out of the way.
Can I use normal potting soil for lehmann's iceplant?
Standard potting compost on its own stays wet far too long for lehmann's iceplant; the lower leaves and stem base go soft and translucent first. A good bagged "cactus and succulent" mix works for lehmann's iceplant if you add roughly 30-50% extra perlite or grit. Mixing your own from the ratio above gives you full control of how fast it dries.
Does lehmann's iceplant need a special pH?
pH is not a concern for lehmann's iceplant — anything from mildly acidic to neutral (6.0-7.0) works. Get the drainage right and pH looks after itself.
Should I buy a bagged mix or make my own for lehmann's iceplant?
A good bagged "cactus and succulent" mix works for lehmann's iceplant if you add roughly 30-50% extra perlite or grit. Mixing your own from the ratio above gives you full control of how fast it dries.
How often should I refresh the soil for lehmann's iceplant?
This mix decomposes slowly, so lehmann's iceplant only needs repotting every 2-3 years — mainly to refresh the grit and check the roots are firm and pale. Use a pot with a drainage hole and empty the saucer within minutes of watering. Terracotta is more forgiving than glazed or plastic because it dries the rootball faster.
Keep reading
- Lehmann's Iceplant care — the full brief (light, water, humidity, problems, pet safety)
- How often to water lehmann's iceplant — the schedule the mix feeds into
- Repotting lehmann's iceplant — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- How often to water succulents — the soak-and-dry method
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
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