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Fertilising guide

How to fertilise Greek Cyclamen (Cyclamen graecum)— schedule & NPK

Also called Greek cyclamen, Autumn cyclamen.

More about greek cyclamen

About Greek Cyclamen

Cyclamen graecum · also called Greek cyclamen, Autumn cyclamen · flowering

Native to Greece, Turkey, and the eastern Mediterranean, Cyclamen graecum is a specialist autumn-blooming species prized for its exceptionally ornate silver- and dark-green-patterned leaves, which often have purple undersides. Flowers appear before the leaves in early autumn in shades of pink to deep rose-purple. It demands a hot, dry summer dormancy and excellent drainage — in the UK it performs best in an unheated alpine greenhouse or very sheltered, sunny raised bed. All parts are toxic to cats and dogs.

Growth habit: Tuberous perennial with a large, flattened corm bearing distinctive deeply patterned, ivy-shaped leaves in autumn and winter; leaves die back completely in late spring.

What fertiliser greek cyclamen actually wants — and why

Greek Cyclamen 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 greek cyclamen: 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 greek cyclamen, 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 greek cyclamen:

Feed with a low-nitrogen, high-potassium liquid fertiliser every three to four weeks during autumn and winter when leaves are present; do not feed during summer dormancy. 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 greek cyclamen 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 greek cyclamen

Half strength is the safe default for greek cyclamen — 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 greek cyclamen first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the greek cyclamen watering schedule.

Signs you are over-feeding greek cyclamen

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

Signs you are under-feeding greek cyclamen

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

Flushing and leaching the salts

Flush the pot of greek cyclamen 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 greek cyclamen

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 greek cyclamen — frequently asked questions

What fertiliser does greek cyclamen 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. Greek Cyclamen 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 greek cyclamen?

Feed with a low-nitrogen, high-potassium liquid fertiliser every three to four weeks during autumn and winter when leaves are present; do not feed during summer dormancy. Feed with a low-nitrogen, high-potassium liquid fertiliser every three to four weeks during autumn and winter when leaves are present; do not feed during summer dormancy. 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 greek cyclamen?

Half strength is the safe default for greek cyclamen — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding greek cyclamen 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 greek cyclamen 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 greek cyclamen?

Flush the pot of greek cyclamen 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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