Cold hardiness & minimum temperature

Is Lycaste aromatica (Lycaste aromatica)cold hardy? Hardiness zone & min temp

Also called Fragrant Lycaste, Cinnamon Orchid.

More about lycaste aromatica

About Lycaste aromatica

Lycaste aromatica · also called Fragrant Lycaste, Cinnamon Orchid · flowering

Lycaste aromatica is a Central American orchid famed for waxy, bright yellow flowers that smell strongly of cinnamon, appearing in numbers from the base of leafless pseudobulbs in spring. It is deciduous, dropping its broad pleated leaves before flowering and taking a cool, drier winter rest. Grown cool to intermediate, it is showy and reliably fragrant.

Cold limit: USDA 10-11 outdoors; cool-to-intermediate indoor elsewhere · RHS H1c (10-27°C)

Watch for — No flowers: Skipping the cool, drier winter rest after leaf drop prevents bud formation; give a distinct cooler, drier dormancy to trigger the fragrant spring blooms.

What lycaste aromatica's hardiness rating actually means

Lycaste aromatica 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 10-11 outdoors; cool-to-intermediate indoor elsewhere — 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 5 °C (and never frost). Lycaste aromatica has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for lycaste aromatica as it gets too cold:

Below about about 5 °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 lycaste aromatica go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °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 lycaste aromatica can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Lycaste aromatica hardiness — frequently asked questions

Is lycaste aromatica cold hardy?

Lycaste aromatica 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. Lycaste aromatica can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 outdoors; cool-to-intermediate indoor elsewhere); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature lycaste aromatica can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). Lycaste aromatica has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is lycaste aromatica?

Lycaste aromatica is rated USDA 10-11 outdoors; cool-to-intermediate indoor elsewhere and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can lycaste aromatica survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °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 lycaste aromatica below its minimum temperature?

Below about about 5 °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.