Cold hardiness & minimum temperature

Is Bogota kohleria (Kohleria bogotensis)cold hardy? Hardiness zone & min temp

Also called Bogota kohleria, Tree gloxinia.

More about bogota kohleria

About Bogota kohleria

Kohleria bogotensis · also called Bogota kohleria, Tree gloxinia · houseplant

A velvety, rhizomatous gesneriad from the humid montane forests surrounding Bogotá, Colombia, grown for its pendant tubular flowers with a carmine-red outer tube and cream lobes heavily spotted with burgundy. It thrives in bright indirect light, moderate-to-high humidity, and a well-draining mix kept evenly moist in summer. The rhizomes allow a winter rest.

Cold limit: USDA 10–12 · RHS H1b (15–26°C)

Watch for — Dormancy misread as death: Kohleria dies back to its rhizomes in winter. This is normal dormancy, not plant death. Reduce watering, keep the pot at a minimum of 12°C, and new shoots will emerge in late winter to early spring.

What bogota kohleria's hardiness rating actually means

Bogota kohleria 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). Bogota kohleria has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Bogota kohleria hardiness — frequently asked questions

Is bogota kohleria cold hardy?

Bogota kohleria 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. Bogota kohleria 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 bogota kohleria can survive?

What hardiness zone is bogota kohleria?

Bogota kohleria 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 bogota kohleria 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 bogota kohleria 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.