Cold hardiness & minimum temperature

Is Aglaonema Firecracker (Aglaonema 'Firecracker')cold hardy? Hardiness zone & min temp

Also called Firecracker Aglaonema.

More about aglaonema firecracker

About Aglaonema Firecracker

Aglaonema 'Firecracker' · also called Firecracker Aglaonema · houseplant

Aglaonema 'Firecracker' is a compact red-and-green Chinese evergreen prized for narrow, flame-flushed leaves on a tight, upright clump. It tolerates low light but holds its red pigment best in bright indirect light. An easy, slow-growing tabletop plant that rewards steady warmth, even moisture and protection from cold drafts indoors.

Cold limit: USDA 10-12 (grown as a houseplant in most US and UK homes) · RHS H1b (18-27°C)

Watch for — Yellowing leaves: Usually overwatering or cold stress. Check that the soil dries between waterings and keep it above 16°C.

What aglaonema firecracker's hardiness rating actually means

Aglaonema Firecracker 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 (grown as a houseplant in most US and UK 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 Firecracker has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Aglaonema Firecracker hardiness — frequently asked questions

Is aglaonema firecracker cold hardy?

Aglaonema Firecracker 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 Firecracker can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (grown as a houseplant in most US and UK homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature aglaonema firecracker can survive?

What hardiness zone is aglaonema firecracker?

Aglaonema Firecracker is rated USDA 10-12 (grown as a houseplant in most US and UK homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can aglaonema firecracker 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 firecracker 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.