Fertilising guide
How to fertilise Schwantes' Living Stones (Lithops schwantesii)— schedule & NPK
Also called Schwantes' Living Stones, Schwantes' Lithops.
More about schwantes' living stones
About Schwantes' Living Stones
Lithops schwantesii · also called Schwantes' Living Stones, Schwantes' Lithops · houseplant
Lithops schwantesii is a South African mimicry succulent that disguises itself as pebbles with grey-brown, windowed leaf pairs. It tolerates extreme drought and demands near-perfect drainage. Water only during its active autumn growth cycle and withhold almost entirely in summer dormancy to prevent splitting and rot.
Growth habit: Clumping stemless succulent; paired fleshy leaves mimic stones at soil level
Watch for — Etiolation (stretching toward light): Lithops that do not receive enough direct sun become tall, pale, and structurally weak. Move to the brightest available windowsill or use a dedicated grow light. The stretched growth cannot be reversed, but the plant will normalise with the next growth cycle given adequate light.
What fertiliser schwantes' living stones actually wants — and why
Schwantes' Living Stones 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 schwantes' living stones: 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 schwantes' living stones, 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 schwantes' living stones:
Feed once in early autumn with a very dilute (quarter-strength) low-nitrogen, high-potassium cactus fertiliser. Do not fertilise during dormancy or in the first year after repotting. 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 schwantes' living stones 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 schwantes' living stones
Quarter to half strength at most for schwantes' living stones. 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 schwantes' living stones first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the schwantes' living stones watering schedule.
Signs you are over-feeding schwantes' living stones
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for schwantes' living stones:
- 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 schwantes' living stones
- 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 schwantes' living stones 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 schwantes' living stones until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for schwantes' living stones
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 schwantes' living stones — frequently asked questions
What fertiliser does schwantes' living stones 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. Schwantes' Living Stones 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 schwantes' living stones?
Feed once in early autumn with a very dilute (quarter-strength) low-nitrogen, high-potassium cactus fertiliser. Do not fertilise during dormancy or in the first year after repotting. Feed once in early autumn with a very dilute (quarter-strength) low-nitrogen, high-potassium cactus fertiliser. Do not fertilise during dormancy or in the first year after repotting. 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 schwantes' living stones?
Quarter to half strength at most for schwantes' living stones. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding schwantes' living stones 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 schwantes' living stones 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 schwantes' living stones?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of schwantes' living stones until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Schwantes' Living Stones care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water schwantes' living stones — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
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- How to fertilise hoya curtisii
- How to fertilise alocasia cuprea (red secret)
- All 6887 fertilising guides in the Growli library