Cold hardiness & minimum temperature

Is Pilea pubescens 'Silver Cloud' (Pilea pubescens 'Silver Cloud')cold hardy? Hardiness zone & min temp

Also called silver cloud pilea, silver sparkle pilea.

More about pilea pubescens 'silver cloud'

About Pilea pubescens 'Silver Cloud'

Pilea pubescens 'Silver Cloud' · also called silver cloud pilea, silver sparkle pilea · houseplant

Pilea pubescens 'Silver Cloud' is a striking selection prized for leaves washed in an almost solid, shimmering silver overlay that glints like metal. Softly hairy and compact, it brings reflective texture to shelves and terrariums. Like its species, it wants bright indirect light, warmth, humidity and an evenly moist, free-draining mix, and it is pet-safe within the non-toxic Pilea genus.

Cold limit: USDA 10-11 (indoor in most US homes) · RHS H1b (16-26°C)

What pilea pubescens 'silver cloud''s hardiness rating actually means

Pilea pubescens 'Silver Cloud' 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 10-11 (indoor in most US homes) — 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). Pilea pubescens 'Silver Cloud' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for pilea pubescens 'silver cloud' 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 pilea pubescens 'silver cloud' 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 pilea pubescens 'silver cloud' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Pilea pubescens 'Silver Cloud' hardiness — frequently asked questions

Is pilea pubescens 'silver cloud' cold hardy?

Pilea pubescens 'Silver Cloud' 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. Pilea pubescens 'Silver Cloud' can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature pilea pubescens 'silver cloud' can survive?

What hardiness zone is pilea pubescens 'silver cloud'?

Pilea pubescens 'Silver Cloud' is rated USDA 10-11 (indoor in most US homes) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can pilea pubescens 'silver cloud' 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 pilea pubescens 'silver cloud' 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.