Fertilising guide
How to fertilise Swiss Rock Jasmine (Androsace helvetica)— schedule & NPK
Also called Swiss Rock Jasmine, Helvetian Androsace.
More about swiss rock jasmine
About Swiss Rock Jasmine
Androsace helvetica · also called Swiss Rock Jasmine, Helvetian Androsace · flowering
Swiss Rock Jasmine is a demanding, very tightly cushioned alpine from the high Alps and Swiss limestone ranges, forming rigid domed mounds of minute hairy rosettes. Tiny white or pale pink flowers with a yellow eye appear almost stemlessly in late spring. Among the most challenging Androsace species, it is prized by specialist alpine growers for its exquisite cushion architecture.
Growth habit: Extremely tight, dome-shaped cushion perennial; slow-growing
What fertiliser swiss rock jasmine actually wants — and why
Swiss Rock Jasmine 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 swiss rock jasmine: 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 swiss rock jasmine, 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 swiss rock jasmine:
No feeding. This species inhabits nearly nutrient-free limestone rock. Any fertiliser application will disrupt the tight cushion habit and increase susceptibility to rot. The lean growing medium provides all necessary minerals. 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 swiss rock jasmine 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 swiss rock jasmine
Half strength is the safe default for swiss rock jasmine — 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 swiss rock jasmine first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the swiss rock jasmine watering schedule.
Signs you are over-feeding swiss rock jasmine
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for swiss rock jasmine:
- 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 swiss rock jasmine
- 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 swiss rock jasmine care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of swiss rock jasmine 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 swiss rock jasmine
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 swiss rock jasmine — frequently asked questions
What fertiliser does swiss rock jasmine 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. Swiss Rock Jasmine 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 swiss rock jasmine?
No feeding. This species inhabits nearly nutrient-free limestone rock. Any fertiliser application will disrupt the tight cushion habit and increase susceptibility to rot. The lean growing medium provides all necessary minerals. No feeding. This species inhabits nearly nutrient-free limestone rock. Any fertiliser application will disrupt the tight cushion habit and increase susceptibility to rot. The lean growing medium provides all necessary minerals. 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 swiss rock jasmine?
Half strength is the safe default for swiss rock jasmine — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding swiss rock jasmine 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 swiss rock jasmine 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 swiss rock jasmine?
Flush the pot of swiss rock jasmine 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
- Swiss Rock Jasmine care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water swiss rock jasmine — 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 polypodium cambricum
- How to fertilise polypodium cambricum 'cambricum'
- How to fertilise wall rue
- All 8452 fertilising guides in the Growli library