Cold hardiness & minimum temperature

Is Natal Lily (Clivia miniata)cold hardy? Hardiness zone & min temp

Also called Natal Lily, Bush Lily, Kaffir Lily, Clivia Lily, Flame Lily.

More about natal lily

About Natal Lily

Clivia miniata · also called Natal Lily, Bush Lily · houseplant

Clivia miniata is a robust evergreen perennial native to the shaded ravines and forest margins of KwaZulu-Natal and the Eastern Cape of South Africa, where it grows as a terrestrial herb with thick, fleshy roots. It produces spectacular umbels of orange, scarlet, or yellow trumpet-shaped flowers in late winter to spring and is valued as a long-lived, low-maintenance houseplant. The single most important care fact is a mandatory cool, dry winter rest period (8–10°C) of six to eight weeks — without it plants rarely rebloom. Clivia miniata is toxic to cats and dogs.

Cold limit: USDA 9–11 · RHS H1c (10–25°C (winter rest at 8–12°C))

Watch for — Failure to rebloom: The most common complaint; caused by omitting the cool, dry winter rest — move the plant to a cool room at 8–12°C in autumn, reduce watering, and stop feeding for six to eight weeks to initiate flower spikes.

What natal lily's hardiness rating actually means

Natal Lily 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 9–11 — 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 5 °C (and never frost). Natal Lily has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for natal lily as it gets too cold:

Below about about 5 °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 natal lily go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °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 natal lily can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Natal Lily hardiness — frequently asked questions

Is natal lily cold hardy?

Natal Lily 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. Natal Lily can only live outside year-round in genuinely frost-free climates (roughly USDA 9–11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature natal lily can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). Natal Lily has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is natal lily?

Natal Lily is rated USDA 9–11 and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can natal lily survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °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 natal lily below its minimum temperature?

Below about about 5 °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.