Soil & potting mix
Best soil for Smelly Dorstenia (Dorstenia foetida)
Also called Smelly Dorstenia, Shield Flower, Grendelion.
More about smelly dorstenia
About Smelly Dorstenia
Dorstenia foetida · also called Smelly Dorstenia, Shield Flower · houseplant
Dorstenia foetida is a compact caudiciform succulent native to the Arabian Peninsula and East Africa, with a thickened mahogany-to-dark-green stem reaching 40 cm, scarred with distinctive leaf and inflorescence marks. Its flat, star-shaped flower heads emit a faint unpleasant odour to attract flies. Grow in a warm, bright spot with moderate watering in summer and reduced water in winter.
Preferred mix: Well-draining cactus/succulent mix
Watch for — Stem rot from waterlogged soil: Despite needing more water than typical succulents, D. foetida will rot quickly if water pools around the base. Ensure the pot drains freely and never leave it standing in a saucer of water. Darkening at the stem base is an early warning sign.
Why smelly dorstenia needs this mix
Smelly Dorstenia 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.
- Smelly Dorstenia 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 smelly dorstenia 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 smelly dorstenia; 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 smelly dorstenia 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 smelly dorstenia?
pH is not a concern for smelly dorstenia — 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 smelly dorstenia 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 smelly dorstenia 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 smelly dorstenia covers the timing and technique step by step.
Smelly Dorstenia soil — frequently asked questions
What is the best soil mix for smelly dorstenia?
2 parts standard cactus or succulent compost : 1 part perlite or pumice : 1 part coarse grit or coarse sand. Smelly Dorstenia 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 smelly dorstenia?
Standard potting compost on its own stays wet far too long for smelly dorstenia; the lower leaves and stem base go soft and translucent first. A good bagged "cactus and succulent" mix works for smelly dorstenia 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 smelly dorstenia need a special pH?
pH is not a concern for smelly dorstenia — 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 smelly dorstenia?
A good bagged "cactus and succulent" mix works for smelly dorstenia 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 smelly dorstenia?
This mix decomposes slowly, so smelly dorstenia 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
- Smelly Dorstenia care — the full brief (light, water, humidity, problems, pet safety)
- How often to water smelly dorstenia — the schedule the mix feeds into
- Repotting smelly dorstenia — 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
- Best soil for monstera pinnatipartita variegata
- Best soil for pothos happy leaf
- Best soil for monstera karstenianum peru variegata
- All 8452 soil and potting-mix guides in the Growli library