Soil & potting mix
Best soil for Hairy Aichryson (Aichryson villosum)
Also called Hairy Aichryson, Hairy House Leek.
More about hairy aichryson
About Hairy Aichryson
Aichryson villosum · also called Hairy Aichryson, Hairy House Leek · houseplant
Aichryson villosum is a softly hairy, compact succulent shrublet from the Canary Islands, named for its distinctly villous (densely hairy) stems and leaves. The soft texture makes it a tactile and attractive collector's plant. It produces small yellow flowers in spring and thrives on a bright windowsill with excellent drainage, cool nights, and very sparing watering.
Preferred mix: Very free-draining cactus/succulent mix
Watch for — Stem base rot: The densely hairy stem surface wicks moisture toward the base, making stem rot at soil level a common issue. Use a grit surface mulch, water only at the base, and ensure the pot drains fully after watering.
Why hairy aichryson needs this mix
Hairy Aichryson 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.
- Hairy Aichryson 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 hairy aichryson 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 hairy aichryson; 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 hairy aichryson 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 hairy aichryson?
pH is not a concern for hairy aichryson — 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 hairy aichryson 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 hairy aichryson 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 hairy aichryson covers the timing and technique step by step.
Hairy Aichryson soil — frequently asked questions
What is the best soil mix for hairy aichryson?
2 parts standard cactus or succulent compost : 1 part perlite or pumice : 1 part coarse grit or coarse sand. Hairy Aichryson 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 hairy aichryson?
Standard potting compost on its own stays wet far too long for hairy aichryson; the lower leaves and stem base go soft and translucent first. A good bagged "cactus and succulent" mix works for hairy aichryson 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 hairy aichryson need a special pH?
pH is not a concern for hairy aichryson — 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 hairy aichryson?
A good bagged "cactus and succulent" mix works for hairy aichryson 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 hairy aichryson?
This mix decomposes slowly, so hairy aichryson 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
- Hairy Aichryson care — the full brief (light, water, humidity, problems, pet safety)
- How often to water hairy aichryson — the schedule the mix feeds into
- Repotting hairy aichryson — 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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- All 8452 soil and potting-mix guides in the Growli library