Cold hardiness & minimum temperature
Is Calathea Beauty Star (Goeppertia ornata 'Beauty Star')cold hardy? Hardiness zone & min temp
Also called Calathea Beauty Star, Beauty Star prayer plant, Pinstripe Calathea 'Beauty Star', Goeppertia 'Beauty Star'.
More about calathea beauty star
About Calathea Beauty Star
Goeppertia ornata 'Beauty Star' · also called Calathea Beauty Star, Beauty Star prayer plant · houseplant
Calathea Beauty Star is a striking Marantaceae prayer plant prized for dark leaves striped in fine pink and silver lines with purple undersides. It needs bright indirect light, consistently moist soil with filtered or rainwater, and high humidity above 60%. It is non-toxic to cats and dogs per ASPCA listings for the genus.
Cold limit: USDA 10-11 (grown as an indoor houseplant in cooler climates; not frost-tolerant) (18-29°C)
Watch for — Drooping leaves: Often a watering imbalance (too dry or too wet) or cold drafts. Check soil moisture, keep it away from heaters and cold windows, and maintain temperatures above 16-18°C (60-65°F).
What calathea beauty star's hardiness rating actually means
Calathea Beauty Star 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 10-11 (grown as an indoor houseplant in cooler climates; not frost-tolerant) — 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 5 °C (and never frost). Calathea Beauty Star has no frost tolerance at all — it is an indoor plant in any climate with a real winter.
Concretely, for calathea beauty star as it gets too cold:
- Below about about 5 °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 beauty star go outside or overwinter — and where?
- It can holiday outdoors in summer once nights are reliably above 5 °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 beauty star can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.
Calathea Beauty Star hardiness — frequently asked questions
Is calathea beauty star cold hardy?
Calathea Beauty Star 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 Beauty Star can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (grown as an indoor houseplant in cooler climates; not frost-tolerant)); everywhere else it is a houseplant that summers out at most.
What is the minimum temperature calathea beauty star can survive?
Minimum survivable temperature is roughly about 5 °C (and never frost). Calathea Beauty Star has no frost tolerance at all — it is an indoor plant in any climate with a real winter.
What hardiness zone is calathea beauty star?
Calathea Beauty Star is rated USDA 10-11 (grown as an indoor houseplant in cooler climates; not frost-tolerant) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.
Can calathea beauty star survive winter outside?
It can holiday outdoors in summer once nights are reliably above 5 °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 beauty star below its minimum temperature?
Below about about 5 °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.
Keep reading
- Calathea Beauty Star care — the full brief (light, water, soil, problems, pet safety)
- USDA hardiness zones — find yours and what grows there
- Is calathea beauty star hardy in the UK? — the RHS-rating version
- RHS hardiness ratings — the UK system explained
- Frost-date calculator — your real outdoor window
- The USDA hardiness zone map, explained
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