Cold hardiness & minimum temperature

Is Masdevallia coccinea (Masdevallia coccinea)cold hardy? Hardiness zone & min temp

Also called Scarlet Masdevallia, Colombian Masdevallia.

More about masdevallia coccinea

About Masdevallia coccinea

Masdevallia coccinea · also called Scarlet Masdevallia, Colombian Masdevallia · tropical

Masdevallia coccinea is a striking Andean cloud-forest orchid from Colombia and Peru, sending tall slender stems above the foliage topped with large triangular flowers in magenta, scarlet, white or yellow forms. Cool-growing and tuft-forming, it needs cool nights, steady moisture and high humidity, making it a connoisseur's windowsill or greenhouse plant.

Cold limit: USDA 10-11 (cool greenhouse/indoor only) · RHS H1b (10-22°C)

Watch for — Heat intolerance: Warm nights cause limpness, stalled growth and bud drop; it requires cool conditions and a night temperature dip, struggling through hot summers without a cool spot.

What masdevallia coccinea's hardiness rating actually means

Masdevallia coccinea 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 10-11 (cool greenhouse/indoor only) — 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). Masdevallia coccinea has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Masdevallia coccinea hardiness — frequently asked questions

Is masdevallia coccinea cold hardy?

Masdevallia coccinea 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. Masdevallia coccinea can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (cool greenhouse/indoor only)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature masdevallia coccinea can survive?

What hardiness zone is masdevallia coccinea?

Masdevallia coccinea is rated USDA 10-11 (cool greenhouse/indoor only) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can masdevallia coccinea 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 masdevallia coccinea 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.