Cold hardiness & minimum temperature

Is Aglaonema 'Emerald Beauty' (Aglaonema commutatum 'Emerald Beauty')cold hardy? Hardiness zone & min temp

Also called Emerald Beauty Chinese Evergreen.

More about aglaonema 'emerald beauty'

About Aglaonema 'Emerald Beauty'

Aglaonema commutatum 'Emerald Beauty' · also called Emerald Beauty Chinese Evergreen · houseplant

Aglaonema 'Emerald Beauty', also sold as 'Maria', is a tough, dark-green Chinese Evergreen marbled with soft silver-grey along the veins. It is one of the most shade-tolerant aroids, shrugging off low light and irregular watering. Its deep green leaves resist fading, making it a reliable low-light office and home plant for beginners.

Cold limit: USDA 10-12 (indoor in most US homes) · RHS H1b (18-27°C)

Watch for — Cold-damage blotches: Temperatures below 15°C cause dark, greasy patches; keep away from cold windows and draughts.

What aglaonema 'emerald beauty''s hardiness rating actually means

Aglaonema 'Emerald Beauty' 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 10-12 (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). Aglaonema 'Emerald Beauty' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Aglaonema 'Emerald Beauty' hardiness — frequently asked questions

Is aglaonema 'emerald beauty' cold hardy?

Aglaonema 'Emerald Beauty' 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. Aglaonema 'Emerald Beauty' can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature aglaonema 'emerald beauty' can survive?

What hardiness zone is aglaonema 'emerald beauty'?

Aglaonema 'Emerald Beauty' is rated USDA 10-12 (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 aglaonema 'emerald beauty' 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 aglaonema 'emerald beauty' 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.