Cold hardiness & minimum temperature

Is Blume's Typhonium (Typhonium blumei)cold hardy? Hardiness zone & min temp

Also called Blume's Typhonium, Divaricate Typhonium.

More about blume's typhonium

About Blume's Typhonium

Typhonium blumei · also called Blume's Typhonium, Divaricate Typhonium · tropical

Blume's Typhonium is a compact tuberous aroid native to seasonally dry tropical regions of Southeast Asia. It produces arrow-shaped or hastate leaves and small maroon-purple spathes in summer, dying back to dormancy in the dry season. Grow in bright indirect light with excellent drainage and a warm, dry winter rest. A specialist tropical collector's plant.

Cold limit: USDA 10-12 · RHS H1b (18–30°C growing; store tubers above 10°C in dormancy)

Watch for — Failure to break dormancy: If stored too cold or too wet, tubers may rot. If stored too warm and dry they may desiccate. Ideal storage is 15–20°C in dry compost. If a tuber shows no signs of growth by late spring, check firmness — a firm tuber simply needs warmth and a little water to trigger growth.

What blume's typhonium's hardiness rating actually means

Blume's Typhonium 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 — 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). Blume's Typhonium has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Blume's Typhonium hardiness — frequently asked questions

Is blume's typhonium cold hardy?

Blume's Typhonium 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. Blume's Typhonium can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature blume's typhonium can survive?

What hardiness zone is blume's typhonium?

Blume's Typhonium is rated USDA 10-12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can blume's typhonium 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 blume's typhonium 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.