Cold hardiness & minimum temperature

Is Blood-red Guzmania (Guzmania sanguinea)cold hardy? Hardiness zone & min temp

Also called Blood-red Guzmania, Tank Bromeliad.

More about blood-red guzmania

About Blood-red Guzmania

Guzmania sanguinea · also called Blood-red Guzmania, Tank Bromeliad · tropical

Guzmania sanguinea is a Central American epiphytic bromeliad native to Costa Rica, Panama, and Venezuela, notable for its unusual flowering strategy: rather than producing a tall spike, the inner leaves of the rosette flush to vivid red or orange-red at flowering time, creating a colourful central display that lasts for months. It is more compact than most Guzmania and extremely popular as a long-lasting houseplant. Keep the central tank filled with rainwater at all times for best results. It is non-toxic to cats and dogs.

Cold limit: USDA 10-12 (indoor in most climates) · RHS H1b (16–27°C)

Watch for — Failure to colour up (inner leaves stay green): Insufficient light or incorrect temperatures can prevent the inner leaf flush — ensure the plant receives bright indirect light and temperatures above 18°C to trigger colouring.

What blood-red guzmania's hardiness rating actually means

Blood-red Guzmania 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 climates) — 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). Blood-red Guzmania has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Blood-red Guzmania hardiness — frequently asked questions

Is blood-red guzmania cold hardy?

Blood-red Guzmania 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. Blood-red Guzmania can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor in most climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature blood-red guzmania can survive?

What hardiness zone is blood-red guzmania?

Blood-red Guzmania is rated USDA 10-12 (indoor in most climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can blood-red guzmania 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 blood-red guzmania 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.