Repotting guide

When & how to repot Curror's Cyphostemma (Cyphostemma currorii)

Also called Curror's Cyphostemma, Cobas.

More about curror's cyphostemma

About Curror's Cyphostemma

Cyphostemma currorii · also called Curror's Cyphostemma, Cobas · tropical

Cyphostemma currorii is a spectacular Namibian desert caudiciform known for its massive, pale, barrel-like trunk, papery peeling bark, and large compound leaves that emerge seasonally. Related to C. juttae and C. bainesii, it is among the largest in the genus and requires exactly the same regimen: full sun, ultra-fast-draining mineral soil, and a near-dry winter rest.

Mature size: Up to 2 m (6 ft) tall in cultivation; trunk potentially 60–80 cm (24–32 in) in girth in very old specimens. One of the largest Cyphostemma species.

How to tell curror's cyphostemma needs repotting

Repotting on a calendar is less reliable than reading the plant. For curror's cyphostemma, 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 curror's cyphostemma

Every 2–3 years, into bone-dry mix. Curror's Cyphostemma's growth habit — massive arborescent caudiciform; develops a huge, smooth to papery-barked, barrel or bottle-shaped trunk storing large reserves of water and nutrients. seasonal large pinnate or lobed leaves emerge from the trunk apex; clusters of small grape-like berries follow on mature plants. — sets the pace. Cyphostemma currorii is a spectacular Namibian desert caudiciform known for its massive, pale, barrel-like trunk, papery peeling bark, and large compound leaves that emerge seasonally. Related to C. juttae and C. bainesii, it is among the largest in the genus and requires exactly the same regimen: full sun, ultra-fast-draining mineral soil, and a near-dry winter rest.

What size pot to step curror's cyphostemma up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Curror's Cyphostemma 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 curror's cyphostemma

Spring or summer, while curror's cyphostemma 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 curror's cyphostemma

Repot dry. Do not water curror's cyphostemma 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 extremely fast-draining mineral 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 curror's cyphostemma 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 curror's cyphostemma 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 curror's cyphostemma

Curror's Cyphostemma wants extremely fast-draining mineral mix. This species requires the most mineral-heavy, free-draining mix possible: 65–75% inorganic material (pumice, coarse grit, or perlite) and 25–35% cactus compost. Any organic-rich or moisture-retaining compost will cause trunk rot. Use a large, heavy container to support the substantial weight of a mature caudex. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting curror's cyphostemma — frequently asked questions

How often should you repot curror's cyphostemma?

Every 2–3 years, into bone-dry mix for curror's cyphostemma. Repot curror's cyphostemma every 2–3 years into a snug pot of extremely fast-draining mineral 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 curror's cyphostemma need?

When is the best time of year to repot curror's cyphostemma?

Should you water curror's cyphostemma after repotting?

No — not straight away. Repot curror's cyphostemma 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 curror's cyphostemma after repotting?

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