Fertilising guide

How to fertilise Geranium renardii 'Phillipe Vapelle' (Geranium renardii 'Phillipe Vapelle')— schedule & NPK

Also called Phillipe Vapelle cranesbill.

More about geranium renardii 'phillipe vapelle'

About Geranium renardii 'Phillipe Vapelle'

Geranium renardii 'Phillipe Vapelle' · also called Phillipe Vapelle cranesbill · flowering

'Phillipe Vapelle' is a robust renardii hybrid combining velvety, sage-grey, scalloped foliage with larger, richer violet-blue flowers heavily veined in deep purple through early to midsummer. More free-flowering and slightly bigger than the species, this RHS Award of Garden Merit perennial thrives in sun and well-drained soil, forms a neat mound and dies back over winter.

Growth habit: Compact to medium, clump-forming herbaceous perennial making a mound of velvety, scalloped grey-green leaves with flower stems held above the foliage. Spreads slowly; deciduous to semi-evergreen in mild winters, dying back hard in cold.

Watch for — Powdery mildew in dry spells: Pale coating on leaves in hot, still, dry conditions. Cut affected foliage back and improve air circulation to prompt clean new growth.

What fertiliser geranium renardii 'phillipe vapelle' actually wants — and why

Geranium renardii 'Phillipe Vapelle' 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 geranium renardii 'phillipe vapelle': 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 geranium renardii 'phillipe vapelle', 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 geranium renardii 'phillipe vapelle':

Low feeder. A spring mulch of compost generally suffices; a single light balanced feed in spring suits poorer soils. Avoid heavy feeding, which encourages floppy growth and reduces the proportion of flowers to leaf. 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 geranium renardii 'phillipe vapelle' 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 geranium renardii 'phillipe vapelle'

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

Signs you are over-feeding geranium renardii 'phillipe vapelle'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for geranium renardii 'phillipe vapelle':

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 geranium renardii 'phillipe vapelle'

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 geranium renardii 'phillipe vapelle' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown geranium renardii 'phillipe vapelle' 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 geranium renardii 'phillipe vapelle'

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 geranium renardii 'phillipe vapelle' — frequently asked questions

What fertiliser does geranium renardii 'phillipe vapelle' 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. Geranium renardii 'Phillipe Vapelle' 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 geranium renardii 'phillipe vapelle'?

Low feeder. A spring mulch of compost generally suffices; a single light balanced feed in spring suits poorer soils. Avoid heavy feeding, which encourages floppy growth and reduces the proportion of flowers to leaf. Low feeder. A spring mulch of compost generally suffices; a single light balanced feed in spring suits poorer soils. Avoid heavy feeding, which encourages floppy growth and reduces the proportion of flowers to leaf. 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 geranium renardii 'phillipe vapelle'?

What does over-feeding geranium renardii 'phillipe vapelle' 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 geranium renardii 'phillipe vapelle' 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 geranium renardii 'phillipe vapelle'?