Cold hardiness & minimum temperature

Is Anthurium andreanum 'Sonate' (Anthurium andraeanum 'Sonate')cold hardy? Hardiness zone & min temp

Also called Sonate anthurium, white-pink anthurium.

More about anthurium andreanum 'sonate'

About Anthurium andreanum 'Sonate'

Anthurium andraeanum 'Sonate' · also called Sonate anthurium, white-pink anthurium · tropical

Anthurium andraeanum 'Sonate' is a compact flamingo-flower cultivar prized for its soft white-to-blush spathes and glossy heart-shaped leaves. Bred for long-lasting indoor bloom, it flowers almost year-round in bright indirect light with warmth, moderate humidity and an airy, free-draining mix. Keep it evenly moist, feed lightly, and deadhead spent blooms to encourage more.

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

What anthurium andreanum 'sonate''s hardiness rating actually means

Anthurium andreanum 'Sonate' 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). Anthurium andreanum 'Sonate' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Anthurium andreanum 'Sonate' hardiness — frequently asked questions

Is anthurium andreanum 'sonate' cold hardy?

Anthurium andreanum 'Sonate' 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. Anthurium andreanum 'Sonate' 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 anthurium andreanum 'sonate' can survive?

What hardiness zone is anthurium andreanum 'sonate'?

Anthurium andreanum 'Sonate' 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 anthurium andreanum 'sonate' 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 anthurium andreanum 'sonate' 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.