Fertilising guide

How to fertilise Plectranthus scutellarioides 'Kong Rose' (Plectranthus scutellarioides 'Kong Rose')— schedule & NPK

Also called Kong Rose Coleus, Giant Coleus Rose.

More about plectranthus scutellarioides 'kong rose'

About Plectranthus scutellarioides 'Kong Rose'

Plectranthus scutellarioides 'Kong Rose' · also called Kong Rose Coleus, Giant Coleus Rose · flowering

Kong Rose is a shade-loving coleus from the Kong series bred for huge leaves — up to 15 cm across — splashed rose-pink at the centre with deep green margins. Grown for bold foliage rather than its insignificant flowers, it makes a dramatic container and shade-bed centrepiece. It needs warmth, shelter from wind, and protection from strong sun. Tender perennial grown as an annual.

Growth habit: Upright, bushy, well-branched mounding habit with exceptionally large leaves; benefits from pinching out flower spikes to stay leafy.

Watch for — Sun scorch: The Kong series burns and bleaches in direct sun. Site it in shade to part shade and acclimatise gradually if moving to brighter light.

What fertiliser plectranthus scutellarioides 'kong rose' actually wants — and why

Plectranthus scutellarioides 'Kong Rose' 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 plectranthus scutellarioides 'kong rose': 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 plectranthus scutellarioides 'kong rose', 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 plectranthus scutellarioides 'kong rose':

Feed every 1-2 weeks with a balanced liquid fertiliser at half to full strength to sustain the large leaves, or use slow-release granules at planting. The big foliage is hungry; steady feeding keeps colour vivid and growth lush. For a hungry bloomer that means feeding regularly — every 1-2 weeks — 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 plectranthus scutellarioides 'kong rose' 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 plectranthus scutellarioides 'kong rose'

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

Signs you are over-feeding plectranthus scutellarioides 'kong rose'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for plectranthus scutellarioides 'kong rose':

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 plectranthus scutellarioides 'kong rose'

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 plectranthus scutellarioides 'kong rose' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown plectranthus scutellarioides 'kong rose' 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 plectranthus scutellarioides 'kong rose'

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 plectranthus scutellarioides 'kong rose' — frequently asked questions

What fertiliser does plectranthus scutellarioides 'kong rose' 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. Plectranthus scutellarioides 'Kong Rose' 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 plectranthus scutellarioides 'kong rose'?

Feed every 1-2 weeks with a balanced liquid fertiliser at half to full strength to sustain the large leaves, or use slow-release granules at planting. The big foliage is hungry; steady feeding keeps colour vivid and growth lush. Feed every 1-2 weeks with a balanced liquid fertiliser at half to full strength to sustain the large leaves, or use slow-release granules at planting. The big foliage is hungry; steady feeding keeps colour vivid and growth lush. For a hungry bloomer that means feeding regularly — every 1-2 weeks — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for plectranthus scutellarioides 'kong rose'?

What does over-feeding plectranthus scutellarioides 'kong rose' 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 plectranthus scutellarioides 'kong rose' 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 plectranthus scutellarioides 'kong rose'?