Fertilising guide
How to fertilise Anthurium metallicum (Anthurium metallicum)— schedule & NPK
Also called metallic anthurium.
More about anthurium metallicum
About Anthurium metallicum
Anthurium metallicum · also called metallic anthurium · tropical
Anthurium metallicum is a Colombian aroid named for its large, pendulous heart-shaped leaves with a metallic blue-green iridescence and pale veining. A semi-epiphytic rainforest foliage species, it is grown for its dramatic shimmering leaves rather than flowers. It needs bright indirect light, very high humidity, steady warmth and an open, fast-draining epiphyte mix to thrive.
Growth habit: Evergreen semi-epiphytic aroid forming an upright crown from a short stem, with large, often pendulous heart-shaped leaves that develop a metallic iridescent finish as they mature.
What fertiliser anthurium metallicum actually wants — and why
Anthurium metallicum is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root 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 anthurium metallicum: 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 anthurium metallicum, 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 anthurium metallicum:
Feed every 4-6 weeks in the growing season with a balanced houseplant fertiliser at quarter to half strength, flushing the mix occasionally. Keep feed dilute, as the roots burn easily. Suspend feeding in winter when growth slows. Treat that as every 4-6 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when anthurium metallicum 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 anthurium metallicum
Half strength is the safe default for anthurium metallicum — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water anthurium metallicum first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the anthurium metallicum watering schedule.
Signs you are over-feeding anthurium metallicum
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for anthurium metallicum:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding anthurium metallicum
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full anthurium metallicum care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of anthurium metallicum with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for anthurium metallicum
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
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 anthurium metallicum — frequently asked questions
What fertiliser does anthurium metallicum need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Anthurium metallicum is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed anthurium metallicum?
Feed every 4-6 weeks in the growing season with a balanced houseplant fertiliser at quarter to half strength, flushing the mix occasionally. Keep feed dilute, as the roots burn easily. Suspend feeding in winter when growth slows. Feed every 4-6 weeks in the growing season with a balanced houseplant fertiliser at quarter to half strength, flushing the mix occasionally. Keep feed dilute, as the roots burn easily. Suspend feeding in winter when growth slows. Treat that as every 4-6 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for anthurium metallicum?
Half strength is the safe default for anthurium metallicum — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding anthurium metallicum look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding anthurium metallicum year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of anthurium metallicum?
Flush the pot of anthurium metallicum with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Anthurium metallicum care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water anthurium metallicum — 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