Fertilising guide
How to fertilise Flat-Leaved Crassula (Crassula platyphylla)— schedule & NPK
Also called Burgundy Crassula, Flattened Jade, Red Pancake Crassula.
More about flat-leaved crassula
About Flat-Leaved Crassula
Crassula platyphylla · also called Burgundy Crassula, Flattened Jade · houseplant
Crassula platyphylla is a low-growing South African succulent with broad, flat fleshy leaves that flush deep burgundy-red in bright light. It stays compact and tolerates neglect well. Like other Crassula species, it is listed by ASPCA as toxic to cats and dogs and should be kept away from pets.
Growth habit: Low-growing, spreading semi-prostrate succulent rosette
Watch for — Sunburn: Pale, papery patches appear if moved directly into hot midday sun. Acclimatise the plant gradually.
What fertiliser flat-leaved crassula actually wants — and why
Flat-Leaved Crassula 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 flat-leaved crassula: 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 flat-leaved crassula, 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 flat-leaved crassula:
Apply a low-nitrogen succulent fertiliser at half-strength once a month from spring through to late summer. Withhold feeding entirely in autumn and winter. Keep that to once a month 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 flat-leaved crassula 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 flat-leaved crassula
Quarter to half strength at most for flat-leaved crassula. 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 flat-leaved crassula first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the flat-leaved crassula watering schedule.
Signs you are over-feeding flat-leaved crassula
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for flat-leaved crassula:
- 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 flat-leaved crassula
- 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 flat-leaved crassula 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 flat-leaved crassula until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for flat-leaved crassula
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 flat-leaved crassula — frequently asked questions
What fertiliser does flat-leaved crassula 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. Flat-Leaved Crassula 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 flat-leaved crassula?
Apply a low-nitrogen succulent fertiliser at half-strength once a month from spring through to late summer. Withhold feeding entirely in autumn and winter. Apply a low-nitrogen succulent fertiliser at half-strength once a month from spring through to late summer. Withhold feeding entirely in autumn and winter. Keep that to once a month between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
What strength of feed for flat-leaved crassula?
Quarter to half strength at most for flat-leaved crassula. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding flat-leaved crassula 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 flat-leaved crassula 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 flat-leaved crassula?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of flat-leaved crassula until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Flat-Leaved Crassula care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water flat-leaved crassula — 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 cape sundew
- How to fertilise forked sundew
- How to fertilise metallica palm
- All 11687 fertilising guides in the Growli library