Fertilising guide

How to fertilise Spring Cyclamen (Cyclamen repandum)— schedule & NPK

Also called Spring Sowbread, Ivy-leaved Cyclamen.

More about spring cyclamen

About Spring Cyclamen

Cyclamen repandum · also called Spring Sowbread, Ivy-leaved Cyclamen · flowering

Spring Cyclamen is a delicate woodland tuberous perennial native to Mediterranean woodlands, producing fragrant pink to magenta swept-back flowers in spring. It prefers cool, shaded conditions with well-drained alkaline soil. More cold-tolerant than florist's types. Toxic to pets due to triterpenoid saponins concentrated in the tubers.

Growth habit: Low-growing tuberous woodland perennial with a flattened corm

What fertiliser spring cyclamen actually wants — and why

Spring 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 spring 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 spring 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 spring cyclamen:

Apply a balanced slow-release fertiliser at low rates in autumn when leaves emerge. Avoid excessive nitrogen, which promotes foliage at the expense of flowers. No feeding needed during summer dormancy. In practice: no routine feeding at all for spring 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 spring 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 spring cyclamen

None is the correct answer for spring 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 spring cyclamen first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the spring cyclamen watering schedule.

Signs you are over-feeding spring cyclamen

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for spring 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 spring 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 spring cyclamen care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

If spring 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 spring 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 spring 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 spring cyclamen — frequently asked questions

What fertiliser does spring 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. Spring 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 spring cyclamen?

Apply a balanced slow-release fertiliser at low rates in autumn when leaves emerge. Avoid excessive nitrogen, which promotes foliage at the expense of flowers. No feeding needed during summer dormancy. Apply a balanced slow-release fertiliser at low rates in autumn when leaves emerge. Avoid excessive nitrogen, which promotes foliage at the expense of flowers. No feeding needed during summer dormancy. In practice: no routine feeding at all for spring cyclamen — at most a thin compost mulch for soil structure, never a flowering or nitrogen feed.

What strength of feed for spring cyclamen?