Cold hardiness & minimum temperature

Is Calathea Ornata 'Sanderiana' (Goeppertia ornata 'Sanderiana' (syn. Calathea ornata 'Sanderiana'))cold hardy? Hardiness zone & min temp

Also called Pinstripe Calathea, Pinstripe Plant, Pin-Stripe Prayer Plant, Sanderiana Calathea.

More about calathea ornata 'sanderiana'

About Calathea Ornata 'Sanderiana'

Goeppertia ornata 'Sanderiana' (syn. Calathea ornata 'Sanderiana') · also called Pinstripe Calathea, Pinstripe Plant · houseplant

A tropical Marantaceae prayer plant prized for dark green leaves striped with fine pink-white pinstripes. It wants bright indirect light, consistently moist soil with filtered water, and high humidity above 60 percent. The ASPCA lists Calathea as non-toxic to cats and dogs, making it a pet-safe choice for plant lovers.

Cold limit: USDA 11-12 (grown as a houseplant in all cooler zones) (18-24°C)

Watch for — Yellowing leaves: Often overwatering and soggy roots, sometimes cold drafts. Let the top layer dry between waterings and keep away from heaters and cold windows.

What calathea ornata 'sanderiana''s hardiness rating actually means

Calathea Ornata 'Sanderiana' 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 all cooler zones) — 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 Ornata 'Sanderiana' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Calathea Ornata 'Sanderiana' hardiness — frequently asked questions

Is calathea ornata 'sanderiana' cold hardy?

Calathea Ornata 'Sanderiana' 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 Ornata 'Sanderiana' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (grown as a houseplant in all cooler zones)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature calathea ornata 'sanderiana' can survive?

What hardiness zone is calathea ornata 'sanderiana'?

Calathea Ornata 'Sanderiana' is rated USDA 11-12 (grown as a houseplant in all cooler zones) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can calathea ornata 'sanderiana' 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 ornata 'sanderiana' 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.