Cold hardiness & minimum temperature

Is Calathea Cylindrica (Goeppertia cylindrica)cold hardy? Hardiness zone & min temp

Also called cylindrical calathea.

More about calathea cylindrica

About Calathea Cylindrica

Goeppertia cylindrica · also called cylindrical calathea · houseplant

Goeppertia cylindrica is a compact prayer-plant prized for broad, glossy mid-green leaves with subtle herringbone veining and a pale silvery wash. Like all calatheas it folds its leaves upward at night. It demands warmth, steady humidity and consistently moist, soft water, rewarding good care with dense, upright clumps of foliage indoors year-round.

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

Watch for — Curling or limp leaves: Usually underwatering or dry air; can also signal cold drafts. Check the soil is evenly moist and move away from radiators, doors and AC vents.

What calathea cylindrica's hardiness rating actually means

Calathea Cylindrica 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). Calathea Cylindrica has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Calathea Cylindrica hardiness — frequently asked questions

Is calathea cylindrica cold hardy?

Calathea Cylindrica 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 Cylindrica 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 calathea cylindrica can survive?

What hardiness zone is calathea cylindrica?

Calathea Cylindrica 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 calathea cylindrica 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 cylindrica 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.