Fertilising guide

How to fertilise Pelargonium 'Flower of Spring' (Pelargonium 'Flower of Spring')— schedule & NPK

Also called Flower of Spring geranium, Silver-leaved bedding pelargonium.

More about pelargonium 'flower of spring'

About Pelargonium 'Flower of Spring'

Pelargonium 'Flower of Spring' · also called Flower of Spring geranium, Silver-leaved bedding pelargonium · flowering

A classic Victorian silver-variegated zonal pelargonium with grey-green leaves broadly margined in white and small single scarlet flowers. Long used as a foliage bedding plant for its bright, cool-toned leaves, it is robust and easy in pots and borders. Tender to frost, it wants full sun, gritty free-draining compost and a frost-free winter.

Growth habit: Bushy, upright bedding zonal grown mainly for silver-white variegated foliage with secondary scarlet flowers.

What fertiliser pelargonium 'flower of spring' actually wants — and why

Pelargonium 'Flower of Spring' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom.

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 pelargonium 'flower of spring': 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 pelargonium 'flower of spring', 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 pelargonium 'flower of spring':

Feed fortnightly with a high-potash liquid fertiliser through spring and summer to keep foliage bright and encourage bloom; stop feeding in autumn and winter. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

The dormant-season rule matters more than the exact interval: skip feeding entirely when pelargonium 'flower of spring' 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 pelargonium 'flower of spring'

Follow the flowering-feed label rate for pelargonium 'flower of spring', or half strength if feeding very frequently. These plants genuinely use the nutrients — under-feeding shows up fast as a thin display.

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

Signs you are over-feeding pelargonium 'flower of spring'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for pelargonium 'flower of spring':

Lots of lush leaves but few flowers (too much nitrogen).
Scorched leaf edges and salt crust from too-strong or too-frequent feeds.
Soft, sappy growth prone to aphids and mildew.

Signs you are under-feeding pelargonium 'flower of spring'

Sparse, small, short-lived flowers and pale foliage.
A tired plant that stops blooming early in the season.
Weak growth and poor repeat-flowering after the first flush.

If the symptoms point at watering, light or roots rather than nutrition, the full pelargonium 'flower of spring' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown pelargonium 'flower of spring' accumulates feed salts fast with frequent feeding — water until it drains each time and flush pots with plain water every few weeks to prevent scorch.

Organic vs synthetic feeds for pelargonium 'flower of spring'

Organic options

A liquid comfrey or seaweed feed (naturally potassium-rich) plus compost or well-rotted manure as a mulch. UK: comfrey feed, organic Tomorite, or rose feed; US: Espoma Rose-tone or Neptune's Harvest. Feeds and improves soil.

Synthetic / liquid feeds

A high-potash flowering feed on a regular cadence — UK: Tomorite (Levington), Phostrogen or a specialist rose feed; US: Miracle-Gro Bloom Booster or a rose food. Fast, reliable bloom response.

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 pelargonium 'flower of spring' — frequently asked questions

What fertiliser does pelargonium 'flower of spring' need?

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom. Pelargonium 'Flower of Spring' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

How often should I feed pelargonium 'flower of spring'?

Feed fortnightly with a high-potash liquid fertiliser through spring and summer to keep foliage bright and encourage bloom; stop feeding in autumn and winter. Feed fortnightly with a high-potash liquid fertiliser through spring and summer to keep foliage bright and encourage bloom; stop feeding in autumn and winter. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for pelargonium 'flower of spring'?

What does over-feeding pelargonium 'flower of spring' look like?

Lots of lush leaves but few flowers (too much nitrogen). Scorched leaf edges and salt crust from too-strong or too-frequent feeds. Soft, sappy growth prone to aphids and mildew. Using a high-nitrogen general feed on pelargonium 'flower of spring' is the headline mistake — you grow a big leafy plant with few flowers. The second is simply under-feeding a genuinely hungry bloomer and getting a sparse, short display.

Should I flush the soil of pelargonium 'flower of spring'?