Cold hardiness & minimum temperature

Is Schiede's goldfish plant (Columnea schiedeana)cold hardy? Hardiness zone & min temp

Also called Schiede's goldfish plant, Schiede's columnea.

More about schiede's goldfish plant

About Schiede's goldfish plant

Columnea schiedeana · also called Schiede's goldfish plant, Schiede's columnea · houseplant

Columnea schiedeana is a spreading, relatively easy-to-grow gesneriad with woody horizontal stems, light green leaves, and pendant yellow flowers heavily mottled with deep maroon markings. Native to Mexico and Central America, it suits an intermediate windowsill or conservatory and blooms from late spring to summer.

Cold limit: USDA 10–12 · RHS H1b (16–27 °C)

Watch for — Failure to flower: C. schiedeana needs a brief cooler, drier rest (around 16 °C) in winter to initiate flower buds. Keeping it too warm and consistently moist year-round suppresses blooming. Reduce watering and lower temperatures slightly from November to February.

What schiede's goldfish plant's hardiness rating actually means

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

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

Schiede's goldfish plant hardiness — frequently asked questions

Is schiede's goldfish plant cold hardy?

Schiede's goldfish plant 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. Schiede's goldfish plant 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 schiede's goldfish plant can survive?

What hardiness zone is schiede's goldfish plant?

Schiede's goldfish plant 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 schiede's goldfish plant 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 schiede's goldfish plant 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.