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Fertilising guide

How to fertilise Alpine Rock Jasmine (Androsace alpina)— schedule & NPK

Also called Alpine Rock Jasmine, Alpine Androsace, Alpine Rock-Jasmine.

More about alpine rock jasmine

About Alpine Rock Jasmine

Androsace alpina · also called Alpine Rock Jasmine, Alpine Androsace · flowering

Androsace alpina is a cushion-forming evergreen perennial endemic to high-alpine scree, crevices, and moraines in the Alps, growing at 2,500–3,200 m on well-drained acidic substrates. It forms low mats of tiny, glandular-hairy rosettes and bears small white to rose-pink flowers directly above the foliage in late spring to early summer. In cultivation it requires a very gritty, acidic, sharply drained medium, full sun, and careful watering — best managed in an alpine house or a dedicated scree trough. Sources indicate the species is considered non-toxic to pets, though it does not appear by name on the ASPCA database; classified as mildly-toxic pending direct ASPCA confirmation.

Growth habit: Low-spreading cushion mat of glandular-hairy evergreen rosettes; very slow-growing.

What fertiliser alpine rock jasmine actually wants — and why

Alpine 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 alpine 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 alpine 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 alpine rock jasmine:

Light feeding only — a dilute balanced fertiliser applied once in early spring is sufficient; excess nitrogen weakens the cushion structure and increases disease susceptibility. 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 alpine 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 alpine rock jasmine

Half strength is the safe default for alpine 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 alpine 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 alpine rock jasmine watering schedule.

Signs you are over-feeding alpine rock jasmine

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for alpine rock jasmine:

Signs you are under-feeding alpine rock jasmine

If the symptoms point at watering, light or roots rather than nutrition, the full alpine rock jasmine care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flush the pot of alpine 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 alpine 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 alpine rock jasmine — frequently asked questions

What fertiliser does alpine 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. Alpine 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 alpine rock jasmine?

Light feeding only — a dilute balanced fertiliser applied once in early spring is sufficient; excess nitrogen weakens the cushion structure and increases disease susceptibility. Light feeding only — a dilute balanced fertiliser applied once in early spring is sufficient; excess nitrogen weakens the cushion structure and increases disease susceptibility. 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 alpine rock jasmine?

Half strength is the safe default for alpine 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 alpine 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 alpine 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 alpine rock jasmine?

Flush the pot of alpine 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.

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