Repotting guide

When & how to repot Carrion Flower (Stapelia gigantea) (Stapelia gigantea)

Also called Carrion flower, Starfish flower, Zulu giant, Carrion plant, Toad plant, Giant toad plant.

More about carrion flower (stapelia gigantea)

About Carrion Flower (Stapelia gigantea)

Stapelia gigantea · also called Carrion flower, Starfish flower · flowering

Stapelia gigantea, the carrion or starfish flower, is a clumping South African stem succulent famous for giant star-shaped blooms that smell of rotting meat to lure pollinating flies. Give it full sun to bright light, gritty fast-draining soil, and sparing water. ASPCA lists no toxic Stapelia; treat as low-risk but vet-verify.

Mature size: Stems reach about 20-30 cm (8-12 in) tall, spreading into a clump 30-60 cm (1-2 ft) or wider over time. Star-shaped flowers are enormous for the plant, up to 25-40 cm (10-16 in) across.

Watch for — Black stem and root rot: The most common cause of death, triggered by overwatering, poorly draining soil, or cold-and-wet winters. Stems turn black, mushy, and collapse at the base. Cut well above any rot, let cuttings callous, and replant in dry gritty mix; keep much drier going forward.

How to tell carrion flower (stapelia gigantea) needs repotting

Repotting on a calendar is less reliable than reading the plant. For carrion flower (stapelia gigantea), 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 carrion flower (stapelia gigantea)

Every 2–3 years, into bone-dry mix. Carrion Flower (Stapelia gigantea)'s growth habit — clump-forming leafless stem succulent with erect, soft, four-angled green stems that branch from the base to form a low spreading mat. grown for its dramatic late-summer-to-autumn flowers rather than foliage. — sets the pace. Stapelia gigantea, the carrion or starfish flower, is a clumping South African stem succulent famous for giant star-shaped blooms that smell of rotting meat to lure pollinating flies. Give it full sun to bright light, gritty fast-draining soil, and sparing water. ASPCA lists no toxic Stapelia; treat as low-risk but vet-verify.

What size pot to step carrion flower (stapelia gigantea) up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Carrion Flower (Stapelia gigantea) 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 carrion flower (stapelia gigantea)

Spring or summer, while carrion flower (stapelia gigantea) 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 carrion flower (stapelia gigantea)

Repot dry. Do not water carrion flower (stapelia gigantea) 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 gritty, sharply 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 carrion flower (stapelia gigantea) 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 carrion flower (stapelia gigantea) 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 carrion flower (stapelia gigantea)

Carrion Flower (Stapelia gigantea) wants gritty, sharply draining cactus/succulent mix. Use a cactus or succulent compost cut with 30-50% coarse sand, perlite, or fine pumice so water drains within seconds. A terracotta pot with a generous drainage hole helps the soil dry quickly and protects the fleshy stems from rot. Never use moisture-retentive houseplant potting mix on its own. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting carrion flower (stapelia gigantea) — frequently asked questions

How often should you repot carrion flower (stapelia gigantea)?

Every 2–3 years, into bone-dry mix for carrion flower (stapelia gigantea). Repot carrion flower (stapelia gigantea) every 2–3 years into a snug pot of gritty, sharply 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 carrion flower (stapelia gigantea) need?

When is the best time of year to repot carrion flower (stapelia gigantea)?

Should you water carrion flower (stapelia gigantea) after repotting?

No — not straight away. Repot carrion flower (stapelia gigantea) 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 carrion flower (stapelia gigantea) after repotting?

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