Cold hardiness & minimum temperature

Is Canna-leaved Peace Lily (Spathiphyllum cannifolium)cold hardy? Hardiness zone & min temp

Also called Canna-leaved Peace Lily, Cannifolium Peace Lily.

More about canna-leaved peace lily

About Canna-leaved Peace Lily

Spathiphyllum cannifolium · also called Canna-leaved Peace Lily, Cannifolium Peace Lily · houseplant

Spathiphyllum cannifolium is a tropical species from northern South America and the Caribbean, distinguished by broad, canna-like leaves and creamy-white spathes. Less common in cultivation than hybrid cultivars, it is a collector's species valued for its bold foliage and authentic species character. Care requirements mirror other peace lilies: consistent moisture and warmth.

Cold limit: USDA 11–12 · RHS H1a (18–30°C)

What canna-leaved peace lily's hardiness rating actually means

Canna-leaved Peace Lily 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 H1a means: Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever. On the US scale that maps to USDA 11–12 — 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 above about 15 °C (warm, never cold). Canna-leaved Peace Lily has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for canna-leaved peace lily as it gets too cold:

Below about above about 15 °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 canna-leaved peace lily go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above above 15 °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 canna-leaved peace lily can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

Canna-leaved Peace Lily hardiness — frequently asked questions

Is canna-leaved peace lily cold hardy?

Canna-leaved Peace Lily 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. Canna-leaved Peace Lily can only live outside year-round in genuinely frost-free climates (roughly USDA 11–12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature canna-leaved peace lily can survive?

Minimum survivable temperature is roughly above about 15 °C (warm, never cold). Canna-leaved Peace Lily has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is canna-leaved peace lily?

Canna-leaved Peace Lily is rated USDA 11–12 and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can canna-leaved peace lily survive winter outside?

It can holiday outdoors in summer once nights are reliably above above 15 °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 canna-leaved peace lily below its minimum temperature?

Below about above about 15 °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.