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Fertilising guide

How to fertilise Fittonia (Fittonia albivenis)— schedule & NPK

Also called nerve plant, mosaic plant.

About Fittonia

Fittonia albivenis · also called nerve plant, mosaic plant · houseplant

Fittonia is a low-growing tropical from Peruvian rainforests, grown for its leaves veined in white, pink, or red. It is famously dramatic — it wilts flat the moment the soil dries — but recovers quickly when watered. Pet-safe by ASPCA standards.

The nerve plant, Fittonia albivenis, is native to the rainforests of Peru and the wider western Amazon basin (Colombia, Bolivia, Ecuador, northern Brazil), where it forms low, dense mats on the warm, shaded, perpetually humid forest floor.

Feed lightly and infrequently with a dilute balanced fertiliser in the growing season; it is a low-demand creeper, and excess fertiliser salts brown the delicate leaf margins faster than they boost growth.

Growth habit: Low-growing creeping perennial

Sources: aspca.org, en.wikipedia.org, gardenerspath.com

What fertiliser fittonia actually wants — and why

Fittonia 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 fittonia: 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 fittonia, 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 fittonia:

Quarter-strength balanced feed every 4-6 weeks during the growing season. 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 fittonia 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 fittonia

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

Signs you are over-feeding fittonia

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

Signs you are under-feeding fittonia

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

Flushing and leaching the salts

Flush the pot of fittonia 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 fittonia

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 fittonia — frequently asked questions

What fertiliser does fittonia 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. Fittonia 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 fittonia?

Quarter-strength balanced feed every 4-6 weeks during the growing season. Quarter-strength balanced feed every 4-6 weeks during the growing season. 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 fittonia?

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

What does over-feeding fittonia 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 fittonia 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 fittonia?

Flush the pot of fittonia 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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