Fertilising guide

How to fertilise Purple Cyclamen (Cyclamen purpurascens)— schedule & NPK

Also called Purple cyclamen, European cyclamen, Sowbread.

More about purple cyclamen

About Purple Cyclamen

Cyclamen purpurascens · also called Purple cyclamen, European cyclamen · flowering

Native to central Europe from the Alps east through the Balkans, Cyclamen purpurascens is one of the hardiest and most fragrant cyclamen species, producing sweetly scented rosy-pink to purple flowers from midsummer through autumn. Unlike most cyclamen it remains evergreen, retaining its attractive silver-marbled, heart-shaped leaves year-round. The single most important care fact is to keep it relatively dry in summer — excess moisture during dormancy will rot the tuber. All parts of the plant are toxic to cats and dogs.

Growth habit: Clump-forming tuberous perennial with a flat, disc-shaped tuber that sends up evergreen, silver-marbled leaves and reflexed flowers on slender stems.

What fertiliser purple cyclamen actually wants — and why

Purple Cyclamen flowers best on poor soil — feed it and you get a lush leafy plant with very few blooms, the exact opposite of what you want.

Little or nothing. Rich, especially nitrogen-rich, soil pushes foliage at the expense of flowers in this plant — lean ground is the technique, not a deficiency.

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 purple 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 purple 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 purple cyclamen:

Apply a low-nitrogen, high-potassium liquid feed monthly during active growth in late summer and autumn; avoid high-nitrogen feeds that promote soft foliage at the expense of flowers. In practice: no routine feeding at all for purple cyclamen — at most a thin compost mulch for soil structure, never a flowering or nitrogen feed.

The dormant-season rule matters more than the exact interval: skip feeding entirely when purple 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 purple cyclamen

None is the correct answer for purple cyclamen. The flower-versus-foliage trade-off is the whole point: hold back and you get the display.

Feeding always goes onto already-damp soil, never dry roots — water purple cyclamen first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the purple cyclamen watering schedule.

Signs you are over-feeding purple cyclamen

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

Abundant leafy growth and very few flowers (the classic over-rich symptom).
Soft, floppy stems and a sprawling, leafy habit.
Scorched edges and salt crust if it has been fed in a container.

Signs you are under-feeding purple cyclamen

Effectively never an issue — these plants flower on poverty.
Only on genuinely dead soil: weak, thin growth and few blooms.
A short-lived plant in completely spent container compost.

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

Flushing and leaching the salts

If purple cyclamen has accidentally been fed and is all leaf, a plain-water flush plus a move to leaner soil resets it; otherwise no flushing is needed because you are not feeding it.

Organic vs synthetic feeds for purple cyclamen

Organic options

A thin compost mulch for soil structure is the absolute most; mostly, give it nothing. UK/US: leave it lean — no manure, no liquid feed. Poor soil is the active ingredient here.

Synthetic / liquid feeds

None. Synthetic feeds, particularly anything with appreciable nitrogen, directly suppress flowering in purple cyclamen.

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 purple cyclamen — frequently asked questions

What fertiliser does purple cyclamen need?

Little or nothing. Rich, especially nitrogen-rich, soil pushes foliage at the expense of flowers in this plant — lean ground is the technique, not a deficiency. Purple Cyclamen flowers best on poor soil — feed it and you get a lush leafy plant with very few blooms, the exact opposite of what you want.

How often should I feed purple cyclamen?

Apply a low-nitrogen, high-potassium liquid feed monthly during active growth in late summer and autumn; avoid high-nitrogen feeds that promote soft foliage at the expense of flowers. Apply a low-nitrogen, high-potassium liquid feed monthly during active growth in late summer and autumn; avoid high-nitrogen feeds that promote soft foliage at the expense of flowers. In practice: no routine feeding at all for purple cyclamen — at most a thin compost mulch for soil structure, never a flowering or nitrogen feed.

What strength of feed for purple cyclamen?