Fertilising guide
How to fertilise Alocasia Polly (Alocasia × amazonica 'Polly')— schedule & NPK
Also called African mask plant, Amazonian elephant's ear 'Polly', Polly alocasia, Elephant's ear.
More about alocasia polly
About Alocasia Polly
Alocasia × amazonica 'Polly' · also called African mask plant, Amazonian elephant's ear 'Polly' · tropical
Alocasia 'Polly' is a compact tropical aroid prized for its arrow-shaped, near-black leaves laced with bold white-green veins. Its one defining need is steady warmth and high humidity: keep it above 15°C in bright, indirect light, never soggy and never bone-dry. Treat it as a fussy but rewarding indoor specimen rather than a beginner houseplant.
Growth habit: A clump-forming, rhizomatous evergreen perennial with an upright rosette of long-stalked, arrow-shaped leaves. New leaves unfurl one at a time from the centre, and older outer leaves naturally yellow and die back as the plant ages, which is normal rather than a sign of trouble.
Watch for — Spider mites: The RHS notes 'Polly' is prone to glasshouse red spider mite, especially in dry air. Look for fine webbing and pale stippling on leaf undersides. Raise humidity, rinse both sides of the leaves and treat repeatedly with insecticidal soap or neem oil.
What fertiliser alocasia polly actually wants — and why
Alocasia Polly is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom formula.
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 alocasia polly: 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 alocasia polly, 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 alocasia polly:
Feed every 2-3 weeks from spring to autumn with a balanced liquid houseplant fertiliser diluted to half strength, following the RHS general feeding guidance. Stop feeding entirely in winter while growth pauses. 'Polly' is sensitive to salt build-up, so flush the compost with plain water every couple of months to wash out excess fertiliser and prevent leaf-tip burn. For a fast grower like this that means feeding regularly — about every 2-3 weeks — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
The dormant-season rule matters more than the exact interval: skip feeding entirely when alocasia polly 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 alocasia polly
Half strength every feed is the sweet spot for alocasia polly: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
Feeding always goes onto already-damp soil, never dry roots — water alocasia polly first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the alocasia polly watering schedule.
Signs you are over-feeding alocasia polly
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for alocasia polly:
- Brown, scorched leaf tips and margins despite correct watering.
- A white salt crust on the soil or around the pot edge.
- Sudden leaf yellowing and drop shortly after a strong feed.
- Soft, weak, over-stretched growth that cannot support itself.
Signs you are under-feeding alocasia polly
- New leaves coming in noticeably smaller than older ones.
- Pale, yellow-green older leaves and slow growth through peak summer.
- A general loss of vigour and gloss in a plant that should be racing away.
If the symptoms point at watering, light or roots rather than nutrition, the full alocasia polly care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Because you feed often, salts accumulate faster — flush the pot of alocasia polly with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Organic vs synthetic feeds for alocasia polly
Organic options
A diluted seaweed or fish-and-seaweed feed plus a yearly top-dress of worm castings supports fast growth without burn risk. UK: Westland seaweed or Baby Bio Organic; US: Neptune's Harvest or Espoma Indoor!.
Synthetic / liquid feeds
A balanced houseplant liquid at half strength applied frequently — UK: Baby Bio, Phostrogen or Westland Houseplant Feed; US: Miracle-Gro Indoor Plant Food or Dyna-Gro Foliage-Pro for steady leafy growth.
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 alocasia polly — frequently asked questions
What fertiliser does alocasia polly need?
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom formula. Alocasia Polly is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
How often should I feed alocasia polly?
Feed every 2-3 weeks from spring to autumn with a balanced liquid houseplant fertiliser diluted to half strength, following the RHS general feeding guidance. Stop feeding entirely in winter while growth pauses. 'Polly' is sensitive to salt build-up, so flush the compost with plain water every couple of months to wash out excess fertiliser and prevent leaf-tip burn. Feed every 2-3 weeks from spring to autumn with a balanced liquid houseplant fertiliser diluted to half strength, following the RHS general feeding guidance. Stop feeding entirely in winter while growth pauses. 'Polly' is sensitive to salt build-up, so flush the compost with plain water every couple of months to wash out excess fertiliser and prevent leaf-tip burn. For a fast grower like this that means feeding regularly — about every 2-3 weeks — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
What strength of feed for alocasia polly?
Half strength every feed is the sweet spot for alocasia polly: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
What does over-feeding alocasia polly look like?
Brown, scorched leaf tips and margins despite correct watering. A white salt crust on the soil or around the pot edge. Sudden leaf yellowing and drop shortly after a strong feed. Soft, weak, over-stretched growth that cannot support itself. The mistake here is the opposite of most houseplants: under-feeding a fast tropical in peak season starves it, leaving small, pale new leaves and slow growth — but full-strength doses still burn it, so feed often and weak, not occasionally and strong.
Should I flush the soil of alocasia polly?
Because you feed often, salts accumulate faster — flush the pot of alocasia polly with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Keep reading
- Alocasia Polly care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water alocasia polly — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 271 fertilising guides in the Growli library