Soil & potting mix
Best soil for Hairy Stonecrop (Prometheum pilosum)
Also called Hairy Stonecrop, Hairy Rosularia.
More about hairy stonecrop
About Hairy Stonecrop
Prometheum pilosum · also called Hairy Stonecrop, Hairy Rosularia · houseplant
A charming, miniature biennial (or short-lived perennial) succulent from the Caucasus Mountains and northeast Turkey, formerly classified as Sedum pilosum. It forms tight, hairy rosettes resembling a small Sempervivum, flowers in its second year, then dies — but produces offsets if conditions suit. Ideal for alpine troughs, gritty pans, and bright windowsills.
Preferred mix: Sharply drained alpine/gritty mix
Watch for — Crown rot in wet or humid conditions: The hairy, dense rosette traps moisture and is highly susceptible to fungal rot. Ensure perfect drainage, a grit mulch around the crown, and good air circulation. Keep dry in winter.
Why hairy stonecrop needs this mix
Hairy Stonecrop is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Hairy Stonecrop 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 hairy stonecrop 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 hairy stonecrop'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 hairy stonecrop.
pH — does it matter for hairy stonecrop?
Hairy Stonecrop 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 hairy stonecrop 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 hairy stonecrop needs — the free-draining mix does the rest.
Refresh hairy stonecrop'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 hairy stonecrop covers the timing and technique step by step.
Hairy Stonecrop soil — frequently asked questions
What is the best soil mix for hairy stonecrop?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Hairy Stonecrop 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 hairy stonecrop?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates hairy stonecrop's roots. A decent bagged houseplant compost works for hairy stonecrop 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 hairy stonecrop need a special pH?
Hairy Stonecrop 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 hairy stonecrop?
A decent bagged houseplant compost works for hairy stonecrop 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 hairy stonecrop?
Refresh hairy stonecrop'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 hairy stonecrop needs — the free-draining mix does the rest.
Keep reading
- Hairy Stonecrop care — the full brief (light, water, humidity, problems, pet safety)
- How often to water hairy stonecrop — the schedule the mix feeds into
- Repotting hairy stonecrop — 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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- Best soil for aponogeton crispus
- Best soil for marsilea quadrifolia
- All 6887 soil and potting-mix guides in the Growli library