Cold hardiness & minimum temperature

Is Fittonia 'White Anne' (Fittonia albivenis 'White Anne')cold hardy? Hardiness zone & min temp

Also called White nerve plant.

More about fittonia 'white anne'

About Fittonia 'White Anne'

Fittonia albivenis 'White Anne' · also called White nerve plant · houseplant

Fittonia 'White Anne' is a nerve plant with olive-green leaves veined in crisp silvery white, giving a cool, mosaic look. This low tropical creeper from South American forest floors craves warmth, even moisture and high humidity, excelling in terrariums. It wilts theatrically when dry and bounces back once watered, and is ASPCA pet-safe.

Cold limit: USDA 11-12 (indoor in most US homes) · RHS H1b (18-27°C)

Watch for — Browning leaf tips and edges: Low humidity or dry heated air causes crisping; boost humidity and move it away from radiators and draughts.

What fittonia 'white anne''s hardiness rating actually means

Fittonia 'White Anne' is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Its RHS rating of H1b means: Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season. On the US scale that maps to USDA 11-12 (indoor in most US homes) — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Fittonia 'White Anne' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for fittonia 'white anne' as it gets too cold:

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches.
A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover.
Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.

Can fittonia 'white anne' go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually.
Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C.
It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when fittonia 'white anne' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Fittonia 'White Anne' hardiness — frequently asked questions

Is fittonia 'white anne' cold hardy?

Fittonia 'White Anne' is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Indoor-only in almost every home. Fittonia 'White Anne' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature fittonia 'white anne' can survive?

What hardiness zone is fittonia 'white anne'?

Fittonia 'White Anne' is rated USDA 11-12 (indoor in most US homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can fittonia 'white anne' survive winter outside?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually. Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C. It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

What happens to fittonia 'white anne' below its minimum temperature?

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches. A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover. Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.