Repotting guide

When & how to repot Fittonia (Fittonia albivenis)

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.

Use a moisture-retentive but well-aerated peat-based mix; its shallow mat-forming roots and forest-floor origin make it ideal for terrariums where the substrate stays evenly damp.

Mature size: 10-15 cm tall, spreading

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

How to tell fittonia needs repotting

Repotting on a calendar is less reliable than reading the plant. For fittonia, watch for these signs:

Roots creeping out of the drainage holes or matting tightly across the soil surface.
The rootball dries out within a day or two no matter how much you water.
Water channels straight down the gap between rootball and pot without wetting the centre.
Steady decline — thin growth, persistent crispy edges — that good humidity and watering have not fixed. Only then is the disturbance of a repot worth the risk for fittonia.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot fittonia

Every 1–2 years, disturbing the roots as little as possible. Fittonia's growth habit — low-growing creeping perennial — sets the pace. 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.

What size pot to step fittonia up to

Go up only one size and handle the rootball as little as possible. Fittonia resents root disturbance, so the goal is to slide the intact rootball into slightly more soil — not to tease, wash or prune the roots. A modest step up means less shock and a faster recovery.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot fittonia

Early spring, just as new growth restarts, is the ideal window for fittonia. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting fittonia

Keep disturbance to a minimum. Fittonia resents root disturbance, so the plan is to move the intact rootball — not to wash, tease or prune the roots.
Choose just one size up. Pick a pot only one size larger with drainage, and have moisture-retentive moisture-retentive houseplant mix ready.
Slide the rootball out whole. Water the day before, then ease fittonia out keeping the rootball intact. Gently free only the roots that are circling the very bottom.
Nestle it into fresh soil. Add a base layer of fresh mix, set the rootball in at the same depth, and backfill gently around the sides without packing hard.
Water and protect. Water in, then keep it warm, humid and out of direct sun for a few weeks while it re-roots. Expect a short sulk — that is normal.

Aftercare

Expect fittonia to sulk for a couple of weeks — that is normal after any root disturbance for this group. Keep it warm, humid and out of direct sun, water just enough to keep the mix lightly moist, and do not panic and overwater while it re-roots. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for fittonia

Fittonia wants moisture-retentive houseplant mix. Standard potting compost; no special amendments needed. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting fittonia — frequently asked questions

How often should you repot fittonia?

Every 1–2 years, disturbing the roots as little as possible for fittonia. Repot fittonia every 1–2 years, disturbing the roots as little as possible — it sulks for weeks if the rootball is teased apart. Slide it into one size up in spring with fresh moisture-retentive houseplant mix, keep it warm and humid afterwards, and never bare-root or hard-prune the roots.

What size pot does fittonia need?

When is the best time of year to repot fittonia?

Why does fittonia sulk after repotting?

Fittonia resents root disturbance, so a wilt or stall for a week or two after repotting is normal, not a failure. Minimise it by keeping the rootball intact, stepping up just one size, and keeping the plant warm, humid and out of direct sun while it re-roots.

Should you fertilise fittonia after repotting?

Not immediately. Wait about 4 weeks after repotting fittonia. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.