Fertilising guide
How to fertilise Lithops Pseudotruncatella (Lithops pseudotruncatella)— schedule & NPK
Also called mimicry plant, living granite.
More about lithops pseudotruncatella
About Lithops Pseudotruncatella
Lithops pseudotruncatella · also called mimicry plant, living granite · houseplant
Lithops pseudotruncatella is a Namibian living-stone succulent that mimics surrounding pebbles, growing as a pair of fused fleshy leaves with a flat, patterned top window. Highly drought-adapted, it follows a strict yearly cycle: it flowers in autumn and replaces its leaf pair each spring. Pet-safe and tiny, it demands sun and a near-bone-dry regime.
Growth habit: Stemless, near-spherical body made of one pair of swollen fused leaves with a flat patterned top. It renews itself yearly, the old pair shrivelling as a new pair emerges from the central fissure; older plants slowly divide into small clusters.
What fertiliser lithops pseudotruncatella actually wants — and why
Lithops Pseudotruncatella is a true minimal feeder — it stores its own reserves and is far more often killed by over-feeding than starved.
A weak, balanced or cactus-formula feed (low, even numbers such as a diluted 5-10-5 or a dedicated cactus food). Nothing high-nitrogen — fast lush growth is exactly what you do not want.
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 lithops pseudotruncatella: 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 lithops pseudotruncatella, 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 lithops pseudotruncatella:
Generally needs no fertiliser; the lean mineral soil suits it. If desired, give a single very dilute low-nitrogen feed in autumn at most. Feeding encourages soft, split-prone growth and disrupts the natural cycle. In practice that is sparingly through the growing season at most, only between spring through early autumn (roughly March to September) — never in the dormant winter months.
The dormant-season rule matters more than the exact interval: skip feeding entirely when lithops pseudotruncatella 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 lithops pseudotruncatella
Quarter strength is the rule for lithops pseudotruncatella. A full-strength dose is a fast route to scorched roots; when unsure, skip a feed entirely rather than double up.
Feeding always goes onto already-damp soil, never dry roots — water lithops pseudotruncatella first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the lithops pseudotruncatella watering schedule.
Signs you are over-feeding lithops pseudotruncatella
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for lithops pseudotruncatella:
- A white or yellowish salt crust on the soil surface or pot rim.
- Brown, scorched leaf tips or margins despite normal watering.
- Soft, stretched, floppy growth that flops instead of standing firm.
- Roots that look burnt or brown when you next repot.
Signs you are under-feeding lithops pseudotruncatella
- Genuinely rare — these plants coast for a long time on very little.
- Very slow or fully stalled growth across a whole season in good light.
- Overall pale, washed-out colour after years in the same exhausted mix.
If the symptoms point at watering, light or roots rather than nutrition, the full lithops pseudotruncatella care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Because you feed so rarely, salts still creep up over time. Flush the pot of lithops pseudotruncatella with plain water until it runs freely from the base once or twice a year — and always repot into fresh gritty mix every 2-3 years rather than relying on feed.
Organic vs synthetic feeds for lithops pseudotruncatella
Organic options
Worm-casting tea or a very dilute seaweed feed once or twice in the growing season is plenty. In the UK an occasional drop of Westland or Levington seaweed feed; in the US a token quarter-strength Espoma Cactus! liquid. Honestly, fresh gritty mix every couple of years does more than any bottle.
Synthetic / liquid feeds
A purpose-made cactus and succulent feed at quarter strength — UK: Westland or Baby Bio Cacti & Succulent food; US: Miracle-Gro Succulent or Schultz Cactus Plus. Use the cactus formula precisely because it is low-nitrogen.
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 lithops pseudotruncatella — frequently asked questions
What fertiliser does lithops pseudotruncatella need?
A weak, balanced or cactus-formula feed (low, even numbers such as a diluted 5-10-5 or a dedicated cactus food). Nothing high-nitrogen — fast lush growth is exactly what you do not want. Lithops Pseudotruncatella is a true minimal feeder — it stores its own reserves and is far more often killed by over-feeding than starved.
How often should I feed lithops pseudotruncatella?
Generally needs no fertiliser; the lean mineral soil suits it. If desired, give a single very dilute low-nitrogen feed in autumn at most. Feeding encourages soft, split-prone growth and disrupts the natural cycle. Generally needs no fertiliser; the lean mineral soil suits it. If desired, give a single very dilute low-nitrogen feed in autumn at most. Feeding encourages soft, split-prone growth and disrupts the natural cycle. In practice that is sparingly through the growing season at most, only between spring through early autumn (roughly March to September) — never in the dormant winter months.
What strength of feed for lithops pseudotruncatella?
Quarter strength is the rule for lithops pseudotruncatella. A full-strength dose is a fast route to scorched roots; when unsure, skip a feed entirely rather than double up.
What does over-feeding lithops pseudotruncatella look like?
A white or yellowish salt crust on the soil surface or pot rim. Brown, scorched leaf tips or margins despite normal watering. Soft, stretched, floppy growth that flops instead of standing firm. Roots that look burnt or brown when you next repot. Over-feeding is the number-one fertiliser mistake with lithops pseudotruncatella. It does not want a lush growth spurt — extra nitrogen makes it weak, etiolated and rot-prone, the opposite of the tough plant you bought.
Should I flush the soil of lithops pseudotruncatella?
Because you feed so rarely, salts still creep up over time. Flush the pot of lithops pseudotruncatella with plain water until it runs freely from the base once or twice a year — and always repot into fresh gritty mix every 2-3 years rather than relying on feed.
Keep reading
- Lithops Pseudotruncatella care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water lithops pseudotruncatella — 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 3899 fertilising guides in the Growli library