Cold hardiness & minimum temperature

Is Roland-Gosselin's Air Plant (Tillandsia roland-gosselinii)cold hardy? Hardiness zone & min temp

Also called Roland-Gosselin's Air Plant.

More about roland-gosselin's air plant

About Roland-Gosselin's Air Plant

Tillandsia roland-gosselinii · also called Roland-Gosselin's Air Plant · tropical

Tillandsia roland-gosselinii is a large, stemless rosette-forming epiphyte endemic to south-western Mexico, where it grows in seasonally dry tropical forests. It forms an impressive arching rosette of densely trichome-covered leaves up to 45 cm long and produces a spectacular, bright-red pinnately branched inflorescence bearing pale chartreuse flowers when mature. This is a showpiece collector's species that needs brighter, drier conditions than many tropical air plants. It is listed as non-toxic to cats and dogs by the ASPCA.

Cold limit: USDA 9-11 · RHS H1b (12–32°C)

What roland-gosselin's air plant's hardiness rating actually means

Roland-Gosselin's Air 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 9-11 — 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). Roland-Gosselin's Air Plant has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Roland-Gosselin's Air Plant hardiness — frequently asked questions

Is roland-gosselin's air plant cold hardy?

Roland-Gosselin's Air 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. Roland-Gosselin's Air Plant can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature roland-gosselin's air plant can survive?

What hardiness zone is roland-gosselin's air plant?

Roland-Gosselin's Air Plant is rated USDA 9-11 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can roland-gosselin's air 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 roland-gosselin's air 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.