Repotting guide

When & how to repot 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.

Mature size: 30–40 cm tall; stem to 6 cm in diameter

Watch for — Self-seeding can become invasive in the pot: Dorstenia foetida ejects its seeds ballistically when the flower heads ripen, scattering them across adjacent pots. Seeds germinate readily and can crowd out mother plants. Deadhead the shield-shaped flower heads before they fully ripen if unwanted seedlings are a concern.

How to tell smelly dorstenia needs repotting

Repotting on a calendar is less reliable than reading the plant. For smelly dorstenia, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot smelly dorstenia

Every 2–3 years, into bone-dry mix. Smelly Dorstenia's growth habit — erect, unbranched or sparingly branched caudiciform succulent; thickened upright stem with pronounced leaf-scar rings and a succulent base — sets the pace. 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.

What size pot to step smelly dorstenia up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Smelly Dorstenia stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot smelly dorstenia

Spring or summer, while smelly dorstenia is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting smelly dorstenia

Repot dry. Do not water smelly dorstenia for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty well-draining cactus/succulent mix ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set smelly dorstenia at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep smelly dorstenia completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for smelly dorstenia

Smelly Dorstenia wants well-draining cactus/succulent mix. A commercial cactus mix amended with 30–40% perlite or pumice works well. The species tolerates slightly richer soil than pure desert succulents. Shallow, wide pots suit the spreading root system and encourage caudex development at the base. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting smelly dorstenia — frequently asked questions

How often should you repot smelly dorstenia?

Every 2–3 years, into bone-dry mix for smelly dorstenia. Repot smelly dorstenia every 2–3 years into a snug pot of well-draining cactus/succulent mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does smelly dorstenia need?

When is the best time of year to repot smelly dorstenia?

Should you water smelly dorstenia after repotting?

No — not straight away. Repot smelly dorstenia into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise smelly dorstenia after repotting?

Not immediately. Wait about 3 weeks after repotting smelly dorstenia. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.