Cold hardiness & minimum temperature

Is Morren's Catopsis (Catopsis morreniana)cold hardy? Hardiness zone & min temp

Also called Morren's catopsis, catopsis bromeliad.

More about morren's catopsis

About Morren's Catopsis

Catopsis morreniana · also called Morren's catopsis, catopsis bromeliad · tropical

Morren's Catopsis is a delicate tank-forming epiphytic bromeliad from Central America and Mexico, growing in humid forests and cloud forests at varying elevations. It produces smooth, pale-green leaves in a funnel rosette and small white flowers. Its near-transparent leaves are a distinctive feature. The Bromeliaceae family is broadly non-toxic to pets.

Cold limit: USDA 10-12 (indoor-only in temperate climates) · RHS H1c (15-26°C)

What morren's catopsis's hardiness rating actually means

Morren's Catopsis 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 10-12 (indoor-only in temperate climates) — 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). Morren's Catopsis has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for morren's catopsis 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 morren's catopsis 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 morren's catopsis can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Morren's Catopsis hardiness — frequently asked questions

Is morren's catopsis cold hardy?

Morren's Catopsis 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. Morren's Catopsis can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor-only in temperate climates)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature morren's catopsis can survive?

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

What hardiness zone is morren's catopsis?

Morren's Catopsis is rated USDA 10-12 (indoor-only in temperate climates) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can morren's catopsis 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 morren's catopsis 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.