Fertilising guide
How to fertilise Stapelia hirsuta (Stapelia hirsuta)— schedule & NPK
Also called hairy stapelia, shaggy stapelia.
More about stapelia hirsuta
About Stapelia hirsuta
Stapelia hirsuta · also called hairy stapelia, shaggy stapelia · houseplant
Stapelia hirsuta, the hairy or shaggy stapelia, is a South African stem succulent famous for large, velvety, banded red-and-yellow star flowers fringed with long purple hairs that mimic rotting meat to attract fly pollinators. Its soft four-angled stems clump steadily. Grow it as a desert succulent with bright light, sharp drainage, and a dry winter rest.
Growth habit: Clump-forming succulent with erect, soft, four-angled, finely toothed and slightly downy stems that branch from the base into broad mats.
What fertiliser stapelia hirsuta actually wants — and why
Stapelia hirsuta 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 stapelia hirsuta: 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 stapelia hirsuta, 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 stapelia hirsuta:
Feed monthly in spring and summer with a half-strength, low-nitrogen cactus fertiliser. Over-feeding, especially with high nitrogen, produces lush soft growth prone to rot and discourages flowering. Withhold all feed during the winter rest. Keep that to monthly 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 stapelia hirsuta 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 stapelia hirsuta
Quarter to half strength at most for stapelia hirsuta. 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 stapelia hirsuta first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the stapelia hirsuta watering schedule.
Signs you are over-feeding stapelia hirsuta
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for stapelia hirsuta:
- 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 stapelia hirsuta
- 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 stapelia hirsuta 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 stapelia hirsuta until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for stapelia hirsuta
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 stapelia hirsuta — frequently asked questions
What fertiliser does stapelia hirsuta 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. Stapelia hirsuta 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 stapelia hirsuta?
Feed monthly in spring and summer with a half-strength, low-nitrogen cactus fertiliser. Over-feeding, especially with high nitrogen, produces lush soft growth prone to rot and discourages flowering. Withhold all feed during the winter rest. Feed monthly in spring and summer with a half-strength, low-nitrogen cactus fertiliser. Over-feeding, especially with high nitrogen, produces lush soft growth prone to rot and discourages flowering. Withhold all feed during the winter rest. Keep that to monthly between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
What strength of feed for stapelia hirsuta?
Quarter to half strength at most for stapelia hirsuta. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding stapelia hirsuta 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 stapelia hirsuta 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 stapelia hirsuta?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of stapelia hirsuta until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Stapelia hirsuta care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water stapelia hirsuta — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 5561 fertilising guides in the Growli library