Cold hardiness & minimum temperature

Is Caladium Freida Hemple (Caladium 'Freida Hemple')cold hardy? Hardiness zone & min temp

Also called Freida Hemple caladium, red elephant ear caladium.

More about caladium freida hemple

About Caladium Freida Hemple

Caladium 'Freida Hemple' · also called Freida Hemple caladium, red elephant ear caladium · tropical

'Freida Hemple' is a heat- and sun-tolerant fancy-leaf caladium with bold, solid-red centres bordered by a wide green margin. This tuberous tropical pushes large heart-shaped leaves through the warm season, then dies back to dormancy. Among the most sun-tolerant caladiums, it still colours best in bright shade with steady warmth and moisture.

Cold limit: USDA 9-11 (grown as a tender tuber or houseplant elsewhere) · RHS H1b (21-30°C)

Watch for — Tuber rot in storage: Cold or damp dormancy conditions; keep dormant tubers above 18°C and barely moist in a free-draining medium.

What caladium freida hemple's hardiness rating actually means

Caladium Freida Hemple 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 9-11 (grown as a tender tuber or houseplant elsewhere) — 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). Caladium Freida Hemple has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Caladium Freida Hemple hardiness — frequently asked questions

Is caladium freida hemple cold hardy?

Caladium Freida Hemple 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. Caladium Freida Hemple can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11 (grown as a tender tuber or houseplant elsewhere)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature caladium freida hemple can survive?

What hardiness zone is caladium freida hemple?

Caladium Freida Hemple is rated USDA 9-11 (grown as a tender tuber or houseplant elsewhere) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can caladium freida hemple 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 caladium freida hemple 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.