Fertilising guide
How to fertilise Compton's Gibbaeum (Gibbaeum comptonii)— schedule & NPK
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.
Growth habit: Stemless, clump-forming succulent mesemb with paired, unequal velvety lobes; each growing season produces a new pair that splits the old sheath
What fertiliser compton's gibbaeum actually wants — and why
Compton's Gibbaeum is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for compton's gibbaeum: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed compton's gibbaeum, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For compton's gibbaeum:
Apply a dilute, low-nitrogen cactus fertiliser (e.g., 5-10-10) once at the beginning of autumn growth and once in spring. Never fertilise during summer dormancy or in mid-winter. Keep that to sparingly through the growing season between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when compton's gibbaeum is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for compton's gibbaeum
Quarter to half strength at most for compton's gibbaeum. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
Feeding always goes onto already-damp soil, never dry roots — water compton's gibbaeum first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the compton's gibbaeum watering schedule.
Signs you are over-feeding compton's gibbaeum
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for compton's gibbaeum:
- Stretched, leggy, pale growth with widely spaced leaves.
- A white salt crust on the soil or around the pot rim.
- Brown, crisped leaf tips and edges.
- Soft, mushy tissue at the base — over-feeding plus damp soil rots it.
Signs you are under-feeding compton's gibbaeum
- Uncommon — succulents tolerate lean conditions well.
- Very slow growth and dull, faded colour over a long period.
- Older leaves shed faster than new ones replace them in a tired old mix.
If the symptoms point at watering, light or roots rather than nutrition, the full compton's gibbaeum care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of compton's gibbaeum until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for compton's gibbaeum
Organic options
A heavily diluted seaweed or worm-casting feed once or twice in summer. UK: a drop of Westland seaweed feed; US: quarter-strength Espoma Cactus! or Dr. Earth liquid. Fresh free-draining mix matters more than any feed.
Synthetic / liquid feeds
A dedicated cactus/succulent liquid at quarter to half strength — UK: Baby Bio Cacti & Succulent Drip Feeders or Westland; US: Miracle-Gro Succulent Plant Food or Schultz Cactus Plus.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising compton's gibbaeum — frequently asked questions
What fertiliser does compton's gibbaeum need?
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue. Compton's Gibbaeum is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
How often should I feed compton's gibbaeum?
Apply a dilute, low-nitrogen cactus fertiliser (e.g., 5-10-10) once at the beginning of autumn growth and once in spring. Never fertilise during summer dormancy or in mid-winter. Apply a dilute, low-nitrogen cactus fertiliser (e.g., 5-10-10) once at the beginning of autumn growth and once in spring. Never fertilise during summer dormancy or in mid-winter. Keep that to sparingly through the growing season between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
What strength of feed for compton's gibbaeum?
Quarter to half strength at most for compton's gibbaeum. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding compton's gibbaeum look like?
Stretched, leggy, pale growth with widely spaced leaves. A white salt crust on the soil or around the pot rim. Brown, crisped leaf tips and edges. Soft, mushy tissue at the base — over-feeding plus damp soil rots it. Feeding compton's gibbaeum like a leafy houseplant is the classic error — it produces a flush of pale, stretched, floppy growth that never firms up and is prone to rot at the base.
Should I flush the soil of compton's gibbaeum?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of compton's gibbaeum until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Compton's Gibbaeum care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water compton's gibbaeum — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise peperomia 'napoli nights' (dark form)
- How to fertilise peperomia floribunda
- How to fertilise peperomia elongata
- All 8452 fertilising guides in the Growli library