Repotting guide

When & how to repot Compton's Gibbaeum (Gibbaeum comptonii)

Also called Compton's Gibbaeum.

More about compton's gibbaeum

About Compton's Gibbaeum

Gibbaeum comptonii · also called Compton's Gibbaeum · houseplant

Compton's Gibbaeum is a compact South African mesemb from the Western Cape with paired, unequal succulent lobes and a velvety, greyish-green surface. It blooms in late autumn to winter with small white or pale pink flowers. Like all Gibbaeum, it demands full sun, near-total summer drought, and sharply draining gritty soil.

Mature size: Individual bodies 2–3 cm tall; clumps spread to 6–10 cm across with age

Watch for — Summer rot: Watering during the summer dormancy period causes the lobes to turn translucent and mushy at the base. Cease all watering from late spring through early autumn and ensure the pot dries completely.

How to tell compton's gibbaeum needs repotting

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

Every 2–3 years, into bone-dry mix. Compton's Gibbaeum's growth habit — stemless, clump-forming succulent mesemb with paired, unequal velvety lobes; each growing season produces a new pair that splits the old sheath — sets the pace. Compton's Gibbaeum is a compact South African mesemb from the Western Cape with paired, unequal succulent lobes and a velvety, greyish-green surface. It blooms in late autumn to winter with small white or pale pink flowers. Like all Gibbaeum, it demands full sun, near-total summer drought, and sharply draining gritty soil.

What size pot to step compton's gibbaeum up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Compton's Gibbaeum 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 compton's gibbaeum

Spring or summer, while compton's gibbaeum 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 compton's gibbaeum

Repot dry. Do not water compton's gibbaeum 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 gritty, low-nutrient succulent mix with 50–70% inorganic material 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 compton's gibbaeum 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 compton's gibbaeum 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 compton's gibbaeum

Compton's Gibbaeum wants very gritty, low-nutrient succulent mix with 50–70% inorganic material. A blend of coarse horticultural sand or perlite with a small proportion of loam or cactus compost works well. Avoid peat-heavy mixes. Terra cotta pots and shallow containers help wick away moisture. Ensure drainage holes are unobstructed. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting compton's gibbaeum — frequently asked questions

How often should you repot compton's gibbaeum?

Every 2–3 years, into bone-dry mix for compton's gibbaeum. Repot compton's gibbaeum every 2–3 years into a snug pot of very gritty, low-nutrient succulent mix with 50–70% inorganic material, 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 compton's gibbaeum need?

When is the best time of year to repot compton's gibbaeum?

Should you water compton's gibbaeum after repotting?

No — not straight away. Repot compton's gibbaeum 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 compton's gibbaeum after repotting?

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