Fertilising guide
How to fertilise Black Velvet Anthurium (Anthurium papillilaminum)— schedule & NPK
Also called Black Velvet Anthurium, Velvet Anthurium, Papillilaminum.
More about black velvet anthurium
About Black Velvet Anthurium
Anthurium papillilaminum · also called Black Velvet Anthurium, Velvet Anthurium · houseplant
Anthurium papillilaminum is a prized aroid from lowland Panama, grown for huge heart-shaped leaves with a deep blackish-green velvet finish. It wants bright indirect light, an airy moist aroid mix and high humidity (60-80%). Like all Anthurium, it is toxic to cats and dogs (calcium oxalates) per ASPCA.
Growth habit: Terrestrial, self-heading aroid with a short thick stem rather than a tall climbing vine; it spreads laterally and holds erect petioles topped by broad velvety blades.
Watch for — Browning, crispy leaf edges: Almost always humidity too low (or fertiliser salt buildup). Raise ambient humidity above 60% and flush the substrate occasionally to clear salts.
What fertiliser black velvet anthurium actually wants — and why
Black Velvet Anthurium is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.
A higher-phosphorus "bloom" formula or a species-specific feed (orchid food, African violet food, or a tomato-style high-potash/phosphorus liquid). A high-nitrogen general feed gives you lush leaves and almost no flowers.
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 black velvet 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 black velvet 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 black velvet anthurium:
Feed lightly during active growth with a balanced or aroid fertiliser at quarter to half strength ("weakly, weekly" or every 2-3 waterings). A little supplemental calcium/magnesium (CalMag) supports the large leaves. Reduce or stop feeding in winter; an underfed Anthurium is far easier to recover than an overfed one with salt-burned roots. The pattern that matters: feed little and often through active growth and budding — weekly — and ease right off during the rest period that triggers the next flush.
The dormant-season rule matters more than the exact interval: skip feeding entirely when black velvet 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 black velvet anthurium
Very dilute — quarter strength, the classic "weakly, weekly" approach for black velvet anthurium. These plants have fine roots that scorch easily and a steady trickle beats an occasional strong dose for flowering.
Feeding always goes onto already-damp soil, never dry roots — water black velvet anthurium first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the black velvet anthurium watering schedule.
Signs you are over-feeding black velvet anthurium
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for black velvet anthurium:
- Lush green leaves but few or no flowers (too much nitrogen).
- Brown, scorched leaf tips and edges — a classic fine-root burn.
- White salt crust on the medium or pot, and stalled buds.
- Bud blast: buds forming then shrivelling and dropping.
Signs you are under-feeding black velvet anthurium
- Sparse or no flowering despite good light and the right season.
- Smaller, paler new leaves and a generally weak, tired plant.
- Flowers that are smaller or fade faster than they should.
If the symptoms point at watering, light or roots rather than nutrition, the full black velvet anthurium care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Specialist and bloom feeds leave salts that scorch fine roots — flush black velvet anthurium thoroughly with plain water until it runs clear every 4-6 weeks in the feeding season, and always between feeds for orchids.
Organic vs synthetic feeds for black velvet anthurium
Organic options
Gentler options exist: a dilute seaweed feed (mildly potassium-rich) or worm-casting tea. UK: Westland seaweed, or a dilute tomato feed like Tomorite for bud-formers; US: Espoma Orchid! / Violet! or Neptune's Harvest. Lower burn risk, slower response.
Synthetic / liquid feeds
A species-matched bloom feed at quarter strength — UK: Baby Bio Orchid / African Violet food, or a high-potash Tomorite/Phostrogen for budding bloomers; US: Miracle-Gro Orchid or Bloom Booster, Schultz African Violet.
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 black velvet anthurium — frequently asked questions
What fertiliser does black velvet anthurium need?
A higher-phosphorus "bloom" formula or a species-specific feed (orchid food, African violet food, or a tomato-style high-potash/phosphorus liquid). A high-nitrogen general feed gives you lush leaves and almost no flowers. Black Velvet Anthurium is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.
How often should I feed black velvet anthurium?
Feed lightly during active growth with a balanced or aroid fertiliser at quarter to half strength ("weakly, weekly" or every 2-3 waterings). A little supplemental calcium/magnesium (CalMag) supports the large leaves. Reduce or stop feeding in winter; an underfed Anthurium is far easier to recover than an overfed one with salt-burned roots. Feed lightly during active growth with a balanced or aroid fertiliser at quarter to half strength ("weakly, weekly" or every 2-3 waterings). A little supplemental calcium/magnesium (CalMag) supports the large leaves. Reduce or stop feeding in winter; an underfed Anthurium is far easier to recover than an overfed one with salt-burned roots. The pattern that matters: feed little and often through active growth and budding — weekly — and ease right off during the rest period that triggers the next flush.
What strength of feed for black velvet anthurium?
Very dilute — quarter strength, the classic "weakly, weekly" approach for black velvet anthurium. These plants have fine roots that scorch easily and a steady trickle beats an occasional strong dose for flowering.
What does over-feeding black velvet anthurium look like?
Lush green leaves but few or no flowers (too much nitrogen). Brown, scorched leaf tips and edges — a classic fine-root burn. White salt crust on the medium or pot, and stalled buds. Bud blast: buds forming then shrivelling and dropping. Using an ordinary high-nitrogen houseplant feed on black velvet anthurium is the headline mistake — you get a healthy-looking plant that simply refuses to bloom. The second is feeding through the rest period and breaking the dormancy cue it needs to set buds.
Should I flush the soil of black velvet anthurium?
Specialist and bloom feeds leave salts that scorch fine roots — flush black velvet anthurium thoroughly with plain water until it runs clear every 4-6 weeks in the feeding season, and always between feeds for orchids.
Keep reading
- Black Velvet Anthurium care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water black velvet 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