Fertilising guide

How to fertilise Hooded-leaf Pelargonium (Pelargonium cucullatum)— schedule & NPK

Also called Hooded-leaf Pelargonium, Tree Pelargonium, Wild Malva.

More about hooded-leaf pelargonium

About Hooded-leaf Pelargonium

Pelargonium cucullatum · also called Hooded-leaf Pelargonium, Tree Pelargonium · flowering

Pelargonium cucullatum is a large, woody-stemmed shrub from the coastal fynbos and strandveld of South Africa's Western Cape, notable for its cupped (hooded), aromatic leaves and showy pink to mauve flowers. It is an important parent species in the breeding of regal (Martha Washington) pelargonium hybrids. Grow in full sun with excellent drainage and very sparing water; excessive moisture rots the woody base. Toxic to cats, dogs, and horses.

Growth habit: Upright, much-branched evergreen shrub with thick, woody stems and slightly sticky, aromatic, cupped leaves; can reach shrub proportions if given space.

What fertiliser hooded-leaf pelargonium actually wants — and why

Hooded-leaf Pelargonium 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 hooded-leaf pelargonium: 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 hooded-leaf pelargonium, 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 hooded-leaf pelargonium:

Feed every 1–2 weeks in spring and summer with a high-potash (tomato-type) fertiliser to promote flowering; switch to monthly applications in autumn and stop entirely in winter. For a hungry bloomer that means feeding regularly — monthly — 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 hooded-leaf pelargonium 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 hooded-leaf pelargonium

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

Signs you are over-feeding hooded-leaf pelargonium

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

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 hooded-leaf pelargonium

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 hooded-leaf pelargonium care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown hooded-leaf pelargonium 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 hooded-leaf pelargonium

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 hooded-leaf pelargonium — frequently asked questions

What fertiliser does hooded-leaf pelargonium 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. Hooded-leaf Pelargonium 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 hooded-leaf pelargonium?

Feed every 1–2 weeks in spring and summer with a high-potash (tomato-type) fertiliser to promote flowering; switch to monthly applications in autumn and stop entirely in winter. Feed every 1–2 weeks in spring and summer with a high-potash (tomato-type) fertiliser to promote flowering; switch to monthly applications in autumn and stop entirely in winter. For a hungry bloomer that means feeding regularly — monthly — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for hooded-leaf pelargonium?

What does over-feeding hooded-leaf pelargonium 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 hooded-leaf pelargonium 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 hooded-leaf pelargonium?