Cold hardiness & minimum temperature

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

Also called Frankie fittonia, pink nerve plant.

More about fittonia 'frankie'

About Fittonia 'Frankie'

Fittonia albivenis 'Frankie' · also called Frankie fittonia, pink nerve plant · houseplant

Fittonia 'Frankie' is a striking nerve-plant cultivar with soft green leaves washed in bubblegum pink and crimson veining. A low, spreading rainforest-floor plant from Peru, it craves warmth, high humidity, and steady moisture, excelling in terrariums. It dramatically faints when dry but revives once watered. As a Fittonia it is ASPCA non-toxic and pet-safe.

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

Watch for — Brown, crispy leaf edges: The classic sign of low humidity or dry air. Move it to a terrarium or run a humidifier; aim for 60%+ humidity and keep it away from heat sources and draughts.

What fittonia 'frankie''s hardiness rating actually means

Fittonia 'Frankie' 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 'Frankie' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for fittonia 'frankie' 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 'frankie' 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 'frankie' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Fittonia 'Frankie' hardiness — frequently asked questions

Is fittonia 'frankie' cold hardy?

Fittonia 'Frankie' 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 'Frankie' 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 'frankie' can survive?

What hardiness zone is fittonia 'frankie'?

Fittonia 'Frankie' 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 'frankie' 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 'frankie' 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.