Fertilising guide
How to fertilise Mountain African Daisy (Osteospermum jucundum)— schedule & NPK
Also called Mountain African Daisy, Delightful African Daisy, Bergbietou.
More about mountain african daisy
About Mountain African Daisy
Osteospermum jucundum · also called Mountain African Daisy, Delightful African Daisy · flowering
Osteospermum jucundum is a rhizomatous herbaceous perennial native to the mountains of South Africa and Lesotho, producing solitary, light pinkish-purple daisy-like flowers 5–6 cm across with a contrasting dark eye from spring through autumn. It thrives in full sun with light, well-drained, moderately fertile soil and a warm, south-facing position. The key care point is to overwinter cuttings under glass in frost-prone regions, as the plant is only borderline hardy outside mild, coastal climates. Not confirmed toxic by ASPCA; exercise caution with pets.
Growth habit: Clump-forming, low-spreading rhizomatous perennial
What fertiliser mountain african daisy actually wants — and why
Mountain African Daisy 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 mountain african daisy: 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 mountain african daisy, 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 mountain african daisy:
Apply a low-nitrogen, balanced fertiliser in spring; excessive feeding promotes leafy growth at the cost of flowers. 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 mountain african daisy 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 mountain african daisy
Half strength is the safe default for mountain african daisy — 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 mountain african daisy first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the mountain african daisy watering schedule.
Signs you are over-feeding mountain african daisy
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for mountain african daisy:
- 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 mountain african daisy
- 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 mountain african daisy care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of mountain african daisy 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 mountain african daisy
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 mountain african daisy — frequently asked questions
What fertiliser does mountain african daisy 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. Mountain African Daisy 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 mountain african daisy?
Apply a low-nitrogen, balanced fertiliser in spring; excessive feeding promotes leafy growth at the cost of flowers. Apply a low-nitrogen, balanced fertiliser in spring; excessive feeding promotes leafy growth at the cost of flowers. 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 mountain african daisy?
Half strength is the safe default for mountain african daisy — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding mountain african daisy 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 mountain african daisy 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 mountain african daisy?
Flush the pot of mountain african daisy 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
- Mountain African Daisy care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water mountain african daisy — 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 athyrium niponicum 'ursula's red'
- How to fertilise athyrium filix-femina 'minutissimum'
- How to fertilise athyrium filix-femina 'frizelliae'
- All 10153 fertilising guides in the Growli library