Fertilising guide

How to fertilise Pelargonium 'Paul Crampel' (Pelargonium 'Paul Crampel')— schedule & NPK

Also called Paul Crampel geranium, Victorian bedding geranium.

More about pelargonium 'paul crampel'

About Pelargonium 'Paul Crampel'

Pelargonium 'Paul Crampel' · also called Paul Crampel geranium, Victorian bedding geranium · flowering

Pelargonium 'Paul Crampel' is a celebrated heritage zonal geranium dating to the early 1900s, famed for its dazzling single bright scarlet flowers held in large round heads above a clear dark leaf zone. Vigorous and reliable, it was a mainstay of Victorian and Edwardian bedding schemes and still excels in beds, pots and windowboxes in full sun.

Growth habit: Vigorous, upright and well-branched zonal habit; taller and more robust than miniature types.

Watch for — Reduced flowering: Shade or nitrogen-rich feeding cuts blooms. Give full sun and use a high-potash feed to keep the scarlet flower heads coming.

What fertiliser pelargonium 'paul crampel' actually wants — and why

Pelargonium 'Paul Crampel' 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 'paul crampel': 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 'paul crampel', 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 'paul crampel':

Feed fortnightly through spring and summer with a high-potash liquid feed for maximum flowering. This vigorous variety responds well to regular feeding; stop in autumn as growth slows for 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 'paul crampel' 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 'paul crampel'

Follow the flowering-feed label rate for pelargonium 'paul crampel', 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 'paul crampel' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the pelargonium 'paul crampel' watering schedule.

Signs you are over-feeding pelargonium 'paul crampel'

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

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 'paul crampel'

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 'paul crampel' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown pelargonium 'paul crampel' 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 'paul crampel'

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 'paul crampel' — frequently asked questions

What fertiliser does pelargonium 'paul crampel' 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 'Paul Crampel' 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 'paul crampel'?

Feed fortnightly through spring and summer with a high-potash liquid feed for maximum flowering. This vigorous variety responds well to regular feeding; stop in autumn as growth slows for winter. Feed fortnightly through spring and summer with a high-potash liquid feed for maximum flowering. This vigorous variety responds well to regular feeding; stop in autumn as growth slows for 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 'paul crampel'?

What does over-feeding pelargonium 'paul crampel' 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 'paul crampel' 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 'paul crampel'?