Cold hardiness & minimum temperature

Is Episcia 'Cleopatra' (Episcia cupreata 'Cleopatra')cold hardy? Hardiness zone & min temp

Also called Cleopatra episcia, Cleopatra flame violet.

More about episcia 'cleopatra'

About Episcia 'Cleopatra'

Episcia cupreata 'Cleopatra' · also called Cleopatra episcia, Cleopatra flame violet · flowering

Episcia 'Cleopatra' is a trailing flame violet grown chiefly for its dramatic pink, cream, and green variegated foliage, accented by small tubular red flowers. A tropical gesneriad related to African violets, it spreads by stolons into a low, spilling mat. It thrives in warm, humid, bright-but-shaded conditions and makes an excellent terrarium or hanging-basket plant.

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

Watch for — Brown, crispy leaf edges: Low humidity or cold drafts. Increase ambient moisture; a covered case or pebble tray helps the colour and texture.

What episcia 'cleopatra''s hardiness rating actually means

Episcia 'Cleopatra' 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 virtually all 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). Episcia 'Cleopatra' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Episcia 'Cleopatra' hardiness — frequently asked questions

Is episcia 'cleopatra' cold hardy?

Episcia 'Cleopatra' 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. Episcia 'Cleopatra' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (indoor in virtually all US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature episcia 'cleopatra' can survive?

What hardiness zone is episcia 'cleopatra'?

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

Can episcia 'cleopatra' 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 episcia 'cleopatra' 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.