Repotting guide

When & how to repot Stapelia grandiflora (Stapelia grandiflora)

Also called large-flowered stapelia, carrion flower.

More about stapelia grandiflora

About Stapelia grandiflora

Stapelia grandiflora · also called large-flowered stapelia, carrion flower · houseplant

Stapelia grandiflora is a clumping stem succulent from South Africa grown for its large, star-shaped, hairy maroon flowers that smell of carrion to lure pollinating flies. The soft, four-angled grey-green stems store water, so it tolerates neglect. Give it bright light, very lean gritty soil, and a strict dry winter rest to flower well indoors.

Mature size: Stems reach about 15-20 cm (6-8 in) tall, spreading to 30 cm (12 in) or more as the clump widens; flowers can be 10-16 cm across.

Watch for — Stem rot: Soft, blackening, mushy stems from overwatering or cold-damp conditions. Cut away rot to clean tissue, let it callus, and re-root healthy segments in dry gritty mix.

How to tell stapelia grandiflora needs repotting

Repotting on a calendar is less reliable than reading the plant. For stapelia grandiflora, 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 stapelia grandiflora

Every 2–3 years, into bone-dry mix. Stapelia grandiflora's growth habit — low, clump-forming succulent with erect, soft, four-angled toothed stems that branch from the base to form spreading mats over time. — sets the pace. Stapelia grandiflora is a clumping stem succulent from South Africa grown for its large, star-shaped, hairy maroon flowers that smell of carrion to lure pollinating flies. The soft, four-angled grey-green stems store water, so it tolerates neglect. Give it bright light, very lean gritty soil, and a strict dry winter rest to flower well indoors.

What size pot to step stapelia grandiflora up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Stapelia grandiflora 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 stapelia grandiflora

Spring or summer, while stapelia grandiflora 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 stapelia grandiflora

Repot dry. Do not water stapelia grandiflora 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 free-draining cactus and 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 stapelia grandiflora 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 stapelia grandiflora 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 stapelia grandiflora

Stapelia grandiflora wants free-draining cactus and succulent mix. Use a gritty, fast-draining blend, ideally cactus compost cut 1:1 with perlite, pumice, or coarse sand. A wide, shallow pot with drainage holes suits the spreading, shallow root system; avoid dense, moisture-retentive potting soil. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting stapelia grandiflora — frequently asked questions

How often should you repot stapelia grandiflora?

Every 2–3 years, into bone-dry mix for stapelia grandiflora. Repot stapelia grandiflora every 2–3 years into a snug pot of free-draining cactus and 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 stapelia grandiflora need?

When is the best time of year to repot stapelia grandiflora?

Should you water stapelia grandiflora after repotting?

No — not straight away. Repot stapelia grandiflora 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 stapelia grandiflora after repotting?

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