Cold hardiness & minimum temperature

Is Thick Gongora (Gongora grossa)cold hardy? Hardiness zone & min temp

Also called Thick Gongora.

More about thick gongora

About Thick Gongora

Gongora grossa · also called Thick Gongora · tropical

Gongora grossa is a robust epiphytic orchid from Colombia and Venezuela, producing pendulous racemes of fleshy, fragrant flowers with distinctively thickened, waxy segments. Like all Gongoras it performs best in a hanging basket to allow its drooping spikes to develop unobstructed. Thrives in intermediate to warm conditions with high humidity.

Cold limit: USDA 10–12 · RHS H1b (16–30°C (day); minimum 13°C at night)

Watch for — No flowers produced: Gongora grossa requires a pronounced cool, dry winter rest (2–4 weeks at 13–15°C with reduced watering) to initiate flowering. Without this seasonal cue, plants remain vegetative. Also ensure light levels are adequate throughout the year.

What thick gongora's hardiness rating actually means

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

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

Thick Gongora hardiness — frequently asked questions

Is thick gongora cold hardy?

Thick Gongora 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. Thick Gongora 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 thick gongora can survive?

What hardiness zone is thick gongora?

Thick Gongora 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 thick gongora 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 thick gongora 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.