Fertilising guide
How to fertilise Alocasia Calidora (Alocasia 'Calidora')— schedule & NPK
Also called Persian palm, Calidora elephant ear.
More about alocasia calidora
About Alocasia Calidora
Alocasia 'Calidora' · also called Persian palm, Calidora elephant ear · tropical
Alocasia 'Calidora', sometimes sold as Persian palm, is a robust hybrid (A. odora × A. gageana) grown for enormous, upright, paddle-shaped ribbed green leaves. Among the more forgiving large alocasias, it tolerates a range of light and average humidity, but reaches its dramatic size with warmth, bright indirect light, generous water and a rich, free-draining mix.
Growth habit: Large, vigorous evergreen rhizomatous aroid with an upright, clumping habit and big paddle-shaped leaves. Fast grower in warmth; produces offsets and a stout rhizome, and may slow or go semi-dormant in cool winters.
Watch for — Brown leaf edges: Low humidity or fertiliser-salt buildup. Raise humidity, use filtered water, and flush the pot periodically to clear salts.
What fertiliser alocasia calidora actually wants — and why
Alocasia Calidora 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 calidora: 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 calidora, 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 calidora:
Feed every 2-4 weeks in spring and summer with a balanced houseplant fertiliser at half to full strength to fuel its rapid, large growth. Stop in autumn and winter. As a heavy feeder it benefits from regular feeding, but flush occasionally to prevent salt buildup that browns leaf edges. For a fast grower like this that means feeding regularly — about every 2-4 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 calidora 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 calidora
Half strength every feed is the sweet spot for alocasia calidora: 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 calidora first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the alocasia calidora watering schedule.
Signs you are over-feeding alocasia calidora
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for alocasia calidora:
- 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 calidora
- 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 calidora 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 calidora 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 calidora
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 calidora — frequently asked questions
What fertiliser does alocasia calidora 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 Calidora 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 calidora?
Feed every 2-4 weeks in spring and summer with a balanced houseplant fertiliser at half to full strength to fuel its rapid, large growth. Stop in autumn and winter. As a heavy feeder it benefits from regular feeding, but flush occasionally to prevent salt buildup that browns leaf edges. Feed every 2-4 weeks in spring and summer with a balanced houseplant fertiliser at half to full strength to fuel its rapid, large growth. Stop in autumn and winter. As a heavy feeder it benefits from regular feeding, but flush occasionally to prevent salt buildup that browns leaf edges. For a fast grower like this that means feeding regularly — about every 2-4 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 calidora?
Half strength every feed is the sweet spot for alocasia calidora: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
What does over-feeding alocasia calidora 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 calidora?
Because you feed often, salts accumulate faster — flush the pot of alocasia calidora with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Keep reading
- Alocasia Calidora care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water alocasia calidora — 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 2464 fertilising guides in the Growli library