Cold hardiness & minimum temperature

Is Pilea involucrata 'Norfolk' (Pilea involucrata 'Norfolk')cold hardy? Hardiness zone & min temp

Also called Norfolk friendship plant, patterned pilea.

More about pilea involucrata 'norfolk'

About Pilea involucrata 'Norfolk'

Pilea involucrata 'Norfolk' · also called Norfolk friendship plant, patterned pilea · houseplant

Pilea involucrata 'Norfolk' is a compact friendship plant prized for quilted bronze-green leaves veined with iridescent silver and deep copper undersides. It likes warm, humid conditions, bright indirect light and evenly moist, well-draining soil. A low bushy grower, it makes a colourful terrarium or tabletop plant. ASPCA-listed as non-toxic to cats and dogs.

Cold limit: USDA 11-12 (indoor in most US homes) · RHS H1b (18-27°C)

Watch for — Leaf spotting: Cold water sitting on the fuzzy leaves causes spots. Water at the soil and avoid misting in cool conditions.

What pilea involucrata 'norfolk''s hardiness rating actually means

Pilea involucrata 'Norfolk' 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 (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 involucrata 'Norfolk' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Pilea involucrata 'Norfolk' hardiness — frequently asked questions

Is pilea involucrata 'norfolk' cold hardy?

Pilea involucrata 'Norfolk' 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 involucrata 'Norfolk' can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12 (indoor in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature pilea involucrata 'norfolk' can survive?

What hardiness zone is pilea involucrata 'norfolk'?

Pilea involucrata 'Norfolk' is rated USDA 11-12 (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 involucrata 'norfolk' 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 involucrata 'norfolk' 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.