Cold hardiness & minimum temperature

Is Zomicarpella amazonica (Zomicarpella amazonica)cold hardy? Hardiness zone & min temp

Also called Amazonian zomicarpella.

More about zomicarpella amazonica

About Zomicarpella amazonica

Zomicarpella amazonica · also called Amazonian zomicarpella · tropical

Zomicarpella amazonica is a rare, small tuberous aroid from the rainforests of northwestern Brazil, in the little-known tribe Zomicarpeae. A terrestrial herb of shaded, seasonally wet 'terra firme' forest floor, it grows from a small rhizomatous tuber and produces modest arrow-shaped leaves. It is chiefly a botanical-collector's plant, seldom seen in cultivation.

Cold limit: USDA 11-12 (strictly tropical; keep consistently warm and frost-free) · RHS H1a (20-30°C)

Watch for — Stalled or dormant growth: Cool temperatures or a dry spell can trigger rest. Keep warm and lightly moist and be patient.

What zomicarpella amazonica's hardiness rating actually means

Zomicarpella amazonica 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 H1a means: Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever. On the US scale that maps to USDA 11-12 (strictly tropical; keep consistently warm and frost-free) — 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 above about 15 °C (warm, never cold). Zomicarpella amazonica has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for zomicarpella amazonica as it gets too cold:

Below about above about 15 °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 zomicarpella amazonica go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above above 15 °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 zomicarpella amazonica can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1a figure above.

Zomicarpella amazonica hardiness — frequently asked questions

Is zomicarpella amazonica cold hardy?

Zomicarpella amazonica 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. Zomicarpella amazonica can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (strictly tropical; keep consistently warm and frost-free)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature zomicarpella amazonica can survive?

Minimum survivable temperature is roughly above about 15 °C (warm, never cold). Zomicarpella amazonica has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is zomicarpella amazonica?

Zomicarpella amazonica is rated USDA 11-12 (strictly tropical; keep consistently warm and frost-free) and RHS H1a — Tropical — needs a heated room or greenhouse; no frost tolerance whatsoever.

Can zomicarpella amazonica survive winter outside?

It can holiday outdoors in summer once nights are reliably above above 15 °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 zomicarpella amazonica below its minimum temperature?

Below about above about 15 °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.