Cold hardiness & minimum temperature

Is Calathea Roseopicta 'Princess Jessie' (Goeppertia roseopicta 'Princess Jessie')cold hardy? Hardiness zone & min temp

Also called Calathea Princess Jessie.

More about calathea roseopicta 'princess jessie'

About Calathea Roseopicta 'Princess Jessie'

Goeppertia roseopicta 'Princess Jessie' · also called Calathea Princess Jessie · houseplant

'Princess Jessie' is a roseopicta cultivar prized for broad oval leaves washed pewter-green with a feathered silver midrib and rich burgundy undersides. Like all prayer plants it folds upward at night. It demands warmth, steady moisture, high humidity and bright indirect light, rewarding careful growers with dramatic, near-iridescent foliage indoors.

Cold limit: USDA 11-12 (grown as a houseplant in most of the US) · RHS H1b (18-27°C)

What calathea roseopicta 'princess jessie''s hardiness rating actually means

Calathea Roseopicta 'Princess Jessie' 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 (grown as a houseplant in most of the US) — 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). Calathea Roseopicta 'Princess Jessie' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Calathea Roseopicta 'Princess Jessie' hardiness — frequently asked questions

Is calathea roseopicta 'princess jessie' cold hardy?

Calathea Roseopicta 'Princess Jessie' 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. Calathea Roseopicta 'Princess Jessie' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (grown as a houseplant in most of the US)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature calathea roseopicta 'princess jessie' can survive?

What hardiness zone is calathea roseopicta 'princess jessie'?

Calathea Roseopicta 'Princess Jessie' is rated USDA 11-12 (grown as a houseplant in most of the US) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can calathea roseopicta 'princess jessie' 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 calathea roseopicta 'princess jessie' 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.