Fertilising guide
How to fertilise Carla Black's Anthurium (Anthurium carlablackiae)— schedule & NPK
Also called Carla Black's Anthurium, Carla Black anthurium, velvet-leaf anthurium.
More about carla black's anthurium
About Carla Black's Anthurium
Anthurium carlablackiae · also called Carla Black's Anthurium, Carla Black anthurium · houseplant
Carla Black's Anthurium is a rare velvet-leaf aroid from Panama and Colombia, prized for near-black, pale-veined foliage on a compact terrestrial rosette. It wants bright indirect light, high humidity, warmth, and a chunky, fast-draining aroid mix. Like all anthuriums it is ASPCA-toxic to cats and dogs, so keep it out of pets' reach.
Growth habit: A compact, slow-growing terrestrial aroid that forms a low rosette, with many plants holding their ridged petioles horizontally or even below horizontal. It is grown for its thick, velvety, near-black leaves with striking pale-to-white veins and pink-tinged emergent foliage rather than for size.
Watch for — Yellowing leaves: Usually a sign of overwatering and struggling roots; can also indicate a nutrient shortfall. Check that the substrate drains freely and isn't staying wet, then correct watering before adjusting feeding.
What fertiliser carla black's anthurium actually wants — and why
Carla Black's Anthurium 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 carla black's anthurium: 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 carla black's anthurium, 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 carla black's anthurium:
Feed lightly during the growing season (spring through early autumn) with a balanced, dilute liquid houseplant or aroid fertiliser at roughly half strength every 4-6 weeks. Anthuriums are sensitive to salt buildup, so flush the substrate periodically and reduce or stop 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 carla black's anthurium 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 carla black's anthurium
Half strength is the safe default for carla black's anthurium — 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 carla black's anthurium first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the carla black's anthurium watering schedule.
Signs you are over-feeding carla black's anthurium
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for carla black's anthurium:
- 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 carla black's anthurium
- 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 carla black's anthurium care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of carla black's anthurium 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 carla black's anthurium
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 carla black's anthurium — frequently asked questions
What fertiliser does carla black's anthurium 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. Carla Black's Anthurium 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 carla black's anthurium?
Feed lightly during the growing season (spring through early autumn) with a balanced, dilute liquid houseplant or aroid fertiliser at roughly half strength every 4-6 weeks. Anthuriums are sensitive to salt buildup, so flush the substrate periodically and reduce or stop feeding in winter when growth slows. Feed lightly during the growing season (spring through early autumn) with a balanced, dilute liquid houseplant or aroid fertiliser at roughly half strength every 4-6 weeks. Anthuriums are sensitive to salt buildup, so flush the substrate periodically and reduce or stop 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 carla black's anthurium?
Half strength is the safe default for carla black's anthurium — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding carla black's anthurium 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 carla black's anthurium 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 carla black's anthurium?
Flush the pot of carla black's anthurium 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
- Carla Black's Anthurium care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water carla black's anthurium — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 609 fertilising guides in the Growli library