Repotting guide

When & how to repot Bell Cotyledon (Cotyledon campanulata)

Also called Bell Cotyledon.

More about bell cotyledon

About Bell Cotyledon

Cotyledon campanulata · also called Bell Cotyledon · houseplant

A rare, upright South African succulent with cylindrical, grey-green leaves and distinctive tubular, bell-shaped red-orange flowers. Less commonly cultivated than Cotyledon orbiculata but equally striking when in bloom. Needs the same bright, dry conditions and infrequent watering as other Cotyledon. Best suited to experienced succulent growers.

Mature size: 30–60 cm (12–24 in) tall

Watch for — Overwatering and root rot: Like all Cotyledon, campanulata is highly susceptible to root and crown rot when kept too moist. Err on the side of under-watering; the plant is far more tolerant of drought than wet conditions.

How to tell bell cotyledon needs repotting

Repotting on a calendar is less reliable than reading the plant. For bell cotyledon, 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 bell cotyledon

Every 2–3 years, into bone-dry mix. Bell Cotyledon's growth habit — upright, branching succulent sub-shrub — sets the pace. A rare, upright South African succulent with cylindrical, grey-green leaves and distinctive tubular, bell-shaped red-orange flowers. Less commonly cultivated than Cotyledon orbiculata but equally striking when in bloom. Needs the same bright, dry conditions and infrequent watering as other Cotyledon. Best suited to experienced succulent growers.

What size pot to step bell cotyledon up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Bell Cotyledon 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 bell cotyledon

Spring or summer, while bell cotyledon 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 bell cotyledon

Repot dry. Do not water bell cotyledon 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 very free-draining, gritty 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 bell cotyledon 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 bell cotyledon 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 bell cotyledon

Bell Cotyledon wants very free-draining, gritty succulent mix. A mix of 50% coarse grit or pumice and 50% lean cactus compost provides the sharp drainage this species demands. Good aeration around roots prevents the crown rot to which Cotyledon are prone. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bell cotyledon — frequently asked questions

How often should you repot bell cotyledon?

Every 2–3 years, into bone-dry mix for bell cotyledon. Repot bell cotyledon every 2–3 years into a snug pot of very free-draining, gritty 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 bell cotyledon need?

When is the best time of year to repot bell cotyledon?

Should you water bell cotyledon after repotting?

No — not straight away. Repot bell cotyledon 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 bell cotyledon after repotting?

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