Fertilising guide
How to fertilise Anthurium andreanum 'Sonate' (Anthurium andraeanum 'Sonate')— schedule & NPK
Also called Sonate anthurium, white-pink anthurium.
More about anthurium andreanum 'sonate'
About Anthurium andreanum 'Sonate'
Anthurium andraeanum 'Sonate' · also called Sonate anthurium, white-pink anthurium · tropical
Anthurium andraeanum 'Sonate' is a compact flamingo-flower cultivar prized for its soft white-to-blush spathes and glossy heart-shaped leaves. Bred for long-lasting indoor bloom, it flowers almost year-round in bright indirect light with warmth, moderate humidity and an airy, free-draining mix. Keep it evenly moist, feed lightly, and deadhead spent blooms to encourage more.
Growth habit: Compact, self-heading evergreen cultivar that produces a steady succession of white-to-pink spathes above glossy heart-shaped leaves.
Watch for — Few or no flowers: Most often insufficient light or excess nitrogen. Move to brighter indirect light and use a lower-nitrogen, bloom-supporting feed.
What fertiliser anthurium andreanum 'sonate' actually wants — and why
Anthurium andreanum 'Sonate' 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 andreanum 'sonate': 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 andreanum 'sonate', 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 andreanum 'sonate':
Feed every 4-6 weeks in spring and summer with a balanced or bloom-supporting liquid fertiliser at quarter to half strength; over-feeding favours leaves over flowers. Reduce in winter. 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 andreanum 'sonate' 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 andreanum 'sonate'
Half strength is the safe default for anthurium andreanum 'sonate' — 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 andreanum 'sonate' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the anthurium andreanum 'sonate' watering schedule.
Signs you are over-feeding anthurium andreanum 'sonate'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for anthurium andreanum 'sonate':
- 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 andreanum 'sonate'
- 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 andreanum 'sonate' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of anthurium andreanum 'sonate' 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 andreanum 'sonate'
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 andreanum 'sonate' — frequently asked questions
What fertiliser does anthurium andreanum 'sonate' 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 andreanum 'Sonate' 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 andreanum 'sonate'?
Feed every 4-6 weeks in spring and summer with a balanced or bloom-supporting liquid fertiliser at quarter to half strength; over-feeding favours leaves over flowers. Reduce in winter. Feed every 4-6 weeks in spring and summer with a balanced or bloom-supporting liquid fertiliser at quarter to half strength; over-feeding favours leaves over flowers. Reduce in winter. 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 andreanum 'sonate'?
Half strength is the safe default for anthurium andreanum 'sonate' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding anthurium andreanum 'sonate' 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 andreanum 'sonate' 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 andreanum 'sonate'?
Flush the pot of anthurium andreanum 'sonate' 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 andreanum 'Sonate' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water anthurium andreanum 'sonate' — 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