Fertilising guide
How to fertilise Ashton's Ice Plant (Delosperma ashtonii)— schedule & NPK
Also called Ashton Delosperma, Ice Plant.
More about ashton's ice plant
About Ashton's Ice Plant
Delosperma ashtonii · also called Ashton Delosperma, Ice Plant · flowering
Delosperma ashtonii is a South African mat-forming succulent producing vivid magenta-purple flowers over a long summer season. It is among the hardier Delosperma species, suited to rock gardens and sunny borders in frost-tolerant climates. Combines well with other alpine and succulent groundcovers. Not individually ASPCA-listed; treat as mildly toxic as a precaution.
Growth habit: Low, mat-forming semi-evergreen succulent groundcover
Watch for — Reduced flowering: Insufficient light or over-fertile soil limits blooming. Full sun and lean soil are key.
What fertiliser ashton's ice plant actually wants — and why
Ashton's Ice Plant is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
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 ashton'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 ashton'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 ashton's ice plant:
Apply a light application of balanced slow-release granular fertiliser (e.g. 5-10-10) once in spring in very lean soils. Most garden soils need no extra feeding. Avoid high-nitrogen feeds. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when ashton'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 ashton's ice plant
Half strength is the safe default for ashton's ice plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water ashton'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 ashton's ice plant watering schedule.
Signs you are over-feeding ashton's ice plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for ashton's ice plant:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding ashton's ice plant
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full ashton's ice plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of ashton's ice plant with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for ashton's ice plant
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
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 ashton's ice plant — frequently asked questions
What fertiliser does ashton's ice plant need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Ashton's Ice Plant is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed ashton's ice plant?
Apply a light application of balanced slow-release granular fertiliser (e.g. 5-10-10) once in spring in very lean soils. Most garden soils need no extra feeding. Avoid high-nitrogen feeds. Apply a light application of balanced slow-release granular fertiliser (e.g. 5-10-10) once in spring in very lean soils. Most garden soils need no extra feeding. Avoid high-nitrogen feeds. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for ashton's ice plant?
Half strength is the safe default for ashton's ice plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding ashton's ice plant look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding ashton's ice plant year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of ashton's ice plant?
Flush the pot of ashton's ice plant with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Ashton's Ice Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water ashton'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 valentine's crown vetch
- How to fertilise hairy sun rose
- How to fertilise basil-leaved sun rose
- All 11687 fertilising guides in the Growli library