Cold hardiness & minimum temperature

Is Duvalia corderoyi (Duvalia corderoyi)cold hardy? Hardiness zone & min temp

Also called Corderoy's duvalia.

More about duvalia corderoyi

About Duvalia corderoyi

Duvalia corderoyi · also called Corderoy's duvalia · houseplant

Duvalia corderoyi is a small clumping stapeliad from southern Africa forming low cushions of squat, toothed, grey-green stems. Its star-shaped maroon-brown carrion flowers have a finely hairy, glistening centre. A collector's curiosity grown indoors, it demands gritty soil, bright light, warmth, and a dry winter rest to prevent the rot it is prone to.

Cold limit: USDA 10-11 (indoor in most US homes) · RHS H1b (18-27°C)

Watch for — Rot from overwatering: Soft, blackening stems and collapse follow soggy soil, especially in cool months. Water only when fully dry, never in winter, and grow in a gritty open mix.

What duvalia corderoyi's hardiness rating actually means

Duvalia corderoyi 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). Duvalia corderoyi has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Duvalia corderoyi hardiness — frequently asked questions

Is duvalia corderoyi cold hardy?

Duvalia corderoyi 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. Duvalia corderoyi 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 duvalia corderoyi can survive?

What hardiness zone is duvalia corderoyi?

Duvalia corderoyi 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 duvalia corderoyi 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 duvalia corderoyi 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.