Cold hardiness & minimum temperature

Is Sodiros Monopyle (Monopyle sodiroana)cold hardy? Hardiness zone & min temp

Also called Sodiros Monopyle.

More about sodiros monopyle

About Sodiros Monopyle

Monopyle sodiroana · also called Sodiros Monopyle · tropical

Sodiros Monopyle is a rare Ecuadorian gesneriad from humid tropical and montane forests, featuring anisophyllous (unequal paired) leaves with a distinctive texture from hooked hair-like trichomes, and bell-shaped flowers. Grown primarily by specialist collectors, it thrives in high-humidity terrariums or warm greenhouses with filtered light and consistently moist, open substrate.

Cold limit: USDA 11–12 · RHS H1b (16–24°C)

Watch for — Slow or absent growth: Often caused by inadequate warmth (below 16°C) or insufficient light. Ensure minimum temperatures of 18°C and provide supplemental grow lighting if natural light is very low.

What sodiros monopyle's hardiness rating actually means

Sodiros Monopyle 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 11–12 — 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). Sodiros Monopyle has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Sodiros Monopyle hardiness — frequently asked questions

Is sodiros monopyle cold hardy?

Sodiros Monopyle 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. Sodiros Monopyle can only live outside year-round in genuinely frost-free climates (roughly USDA 11–12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature sodiros monopyle can survive?

What hardiness zone is sodiros monopyle?

Sodiros Monopyle is rated USDA 11–12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can sodiros monopyle 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 sodiros monopyle 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.