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Fertilising guide

How to fertilise Lanceolate Anubias (Anubias lanceolata)— schedule & NPK

Also called Lance-Leaf Anubias, Lanceolata Anubias.

More about lanceolate anubias

About Lanceolate Anubias

Anubias lanceolata · also called Lance-Leaf Anubias, Lanceolata Anubias · tropical

Anubias lanceolata is a robust, lance-leaved Anubias species producing long, narrow dark-green leaves on a thick rhizome. Slower-growing and shade-tolerant, it is excellent for low-tech aquariums and is virtually indestructible under a wide range of conditions. As an Araceae aroid, it contains calcium oxalates and is classified as toxic to pets.

Growth habit: Rhizomatous, slow-growing aquatic or semi-aquatic evergreen perennial

Watch for — Yellowing leaves: May indicate iron or micronutrient deficiency, or too much direct light. Assess both factors; Anubias rarely shows deficiency in well-maintained tanks.

What fertiliser lanceolate anubias actually wants — and why

Lanceolate Anubias 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 lanceolate anubias: 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 lanceolate anubias, 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 lanceolate anubias:

Fertilise minimally — Anubias is a slow grower and does not require heavy feeding. A dilute liquid fertiliser once every 2–4 weeks is sufficient. Excess nutrients in low-light conditions primarily feed algae on the leaves, not the plant. 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 lanceolate anubias 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 lanceolate anubias

Half strength is the safe default for lanceolate anubias — 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 lanceolate anubias first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the lanceolate anubias watering schedule.

Signs you are over-feeding lanceolate anubias

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for lanceolate anubias:

Signs you are under-feeding lanceolate anubias

If the symptoms point at watering, light or roots rather than nutrition, the full lanceolate anubias care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flush the pot of lanceolate anubias 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 lanceolate anubias

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 lanceolate anubias — frequently asked questions

What fertiliser does lanceolate anubias 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. Lanceolate Anubias 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 lanceolate anubias?

Fertilise minimally — Anubias is a slow grower and does not require heavy feeding. A dilute liquid fertiliser once every 2–4 weeks is sufficient. Excess nutrients in low-light conditions primarily feed algae on the leaves, not the plant. Fertilise minimally — Anubias is a slow grower and does not require heavy feeding. A dilute liquid fertiliser once every 2–4 weeks is sufficient. Excess nutrients in low-light conditions primarily feed algae on the leaves, not the plant. 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 lanceolate anubias?

Half strength is the safe default for lanceolate anubias — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding lanceolate anubias 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 lanceolate anubias 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 lanceolate anubias?

Flush the pot of lanceolate anubias 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.

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