Fertilising guide
How to fertilise Fishtail Parlour Palm (Chamaedorea ernesti-augusti)— schedule & NPK
Also called Fishtail Parlour Palm, Ernest August's Palm, Xate Palm, Broad-leaf Lady Palm.
More about fishtail parlour palm
About Fishtail Parlour Palm
Chamaedorea ernesti-augusti · also called Fishtail Parlour Palm, Ernest August's Palm · houseplant
A distinctive, slow-growing understorey palm from the tropical forests of Mexico, Belize, and Guatemala, notable for its unusual simple, undivided leaves (rather than feathery fronds) that are deeply notched at the tip, giving them a two-lobed fishtail shape. It is highly shade-tolerant and compact, making it well-suited to low-light indoor rooms and conservatories. Temperature must stay above 10°C at all times — sudden cold draughts cause irreversible frond damage. Chamaedorea ernesti-augusti is considered non-toxic to cats and dogs.
Growth habit: Solitary-stemmed or sparsely clustering palm with distinctive simple, bifid (two-lobed) leaves; very slow-growing, making it an excellent long-term indoor specimen.
Watch for — Spider mites: The most common pest, especially in warm, dry conditions; look for pale yellow stippling and fine webbing on frond undersides, and treat promptly with neem oil or insecticidal soap as populations escalate quickly indoors.
What fertiliser fishtail parlour palm actually wants — and why
Fishtail Parlour Palm 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 fishtail parlour palm: 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 fishtail parlour palm, 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 fishtail parlour palm:
Apply a balanced liquid fertiliser at half strength every three to four weeks during the growing season (April to September); do not feed in winter when growth pauses. Treat that as sparingly through the growing season 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 fishtail parlour palm 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 fishtail parlour palm
Half strength is the safe default for fishtail parlour palm — 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 fishtail parlour palm first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the fishtail parlour palm watering schedule.
Signs you are over-feeding fishtail parlour palm
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for fishtail parlour palm:
- 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 fishtail parlour palm
- 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 fishtail parlour palm care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of fishtail parlour palm 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 fishtail parlour palm
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 fishtail parlour palm — frequently asked questions
What fertiliser does fishtail parlour palm 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. Fishtail Parlour Palm 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 fishtail parlour palm?
Apply a balanced liquid fertiliser at half strength every three to four weeks during the growing season (April to September); do not feed in winter when growth pauses. Apply a balanced liquid fertiliser at half strength every three to four weeks during the growing season (April to September); do not feed in winter when growth pauses. Treat that as sparingly through the growing season 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 fishtail parlour palm?
Half strength is the safe default for fishtail parlour palm — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding fishtail parlour palm 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 fishtail parlour palm 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 fishtail parlour palm?
Flush the pot of fishtail parlour palm 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
- Fishtail Parlour Palm care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water fishtail parlour palm — 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 gypsicola butterwort
- How to fertilise corkscrew plant
- How to fertilise tillandsia andreana
- All 10153 fertilising guides in the Growli library