Fertilising guide
How to fertilise Sutherland's Ice Plant (Delosperma sutherlandii)— schedule & NPK
Also called Sutherland's Delosperma, Hardy Pink Ice Plant.
More about sutherland's ice plant
About Sutherland's Ice Plant
Delosperma sutherlandii · also called Sutherland's Delosperma, Hardy Pink Ice Plant · houseplant
Sutherland's Ice Plant is a hardy South African succulent producing a profusion of vivid pink-purple daisy-like flowers from spring to autumn. Its fleshy, cylindrical leaves form dense, low mats suited to rock gardens and sunny containers. One of the hardier Delosperma species, tolerating light frosts. Non-toxic and pet-safe.
Growth habit: Dense, mat-forming, low-growing succulent perennial
Watch for — Etiolation in low light: Prolonged low-light conditions cause stretched, pale growth and poor flowering. Relocate to the sunniest available spot.
What fertiliser sutherland's ice plant actually wants — and why
Sutherland's Ice Plant 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 sutherland's ice plant: 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 sutherland's ice plant, 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 sutherland's ice plant:
Apply a dilute cactus fertiliser (quarter-strength) once a month during spring and summer. Withhold feeding entirely in autumn and winter. Avoid high-nitrogen formulas that encourage soft, disease-prone growth. 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 sutherland's ice plant 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 sutherland's ice plant
Quarter to half strength at most for sutherland's ice plant. 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 sutherland's ice plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the sutherland's ice plant watering schedule.
Signs you are over-feeding sutherland's ice plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for sutherland's ice plant:
- 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 sutherland's ice plant
- 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 sutherland's ice plant 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 sutherland's ice plant until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for sutherland's ice plant
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 sutherland's ice plant — frequently asked questions
What fertiliser does sutherland's ice plant 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. Sutherland's Ice Plant 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 sutherland's ice plant?
Apply a dilute cactus fertiliser (quarter-strength) once a month during spring and summer. Withhold feeding entirely in autumn and winter. Avoid high-nitrogen formulas that encourage soft, disease-prone growth. Apply a dilute cactus fertiliser (quarter-strength) once a month during spring and summer. Withhold feeding entirely in autumn and winter. Avoid high-nitrogen formulas that encourage soft, disease-prone growth. 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 sutherland's ice plant?
Quarter to half strength at most for sutherland's ice plant. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding sutherland's ice plant 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 sutherland's ice plant 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 sutherland's ice plant?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of sutherland's ice plant until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Sutherland's Ice Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water sutherland's ice plant — 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 tree houseleek
- How to fertilise blue chalksticks
- How to fertilise baby tears (pilea)
- All 11687 fertilising guides in the Growli library