Cold hardiness & minimum temperature

Is Curio Ficoides 'Mount Everest' (Curio ficoides 'Mount Everest')cold hardy? Hardiness zone & min temp

Also called Mount Everest senecio, ice plant senecio.

More about curio ficoides 'mount everest'

About Curio Ficoides 'Mount Everest'

Curio ficoides 'Mount Everest' · also called Mount Everest senecio, ice plant senecio · houseplant

Curio ficoides 'Mount Everest' (formerly Senecio ficoides) is an upright South African succulent with chunky, finger-like blue-grey leaves coated in a frosty, powdery bloom. Sculptural and shrubby rather than trailing, it forms a striking architectural specimen. It demands strong light, very free-draining mineral soil and sparing water, and resents handling that rubs off its protective waxy coating.

Cold limit: USDA 9-11 (indoor in most US homes) · RHS H2 (18-27°C)

Watch for — Loss of frosty coating: The powdery farina rubs off permanently where handled and does not regenerate on that leaf. Move the plant by the pot, not the leaves.

What curio ficoides 'mount everest''s hardiness rating actually means

Curio Ficoides 'Mount Everest' is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Its RHS rating of H2 means: Tender — survives a frost-free greenhouse or a very mild, sheltered spot. On the US scale that maps to USDA 9-11 (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 1 to 5 °C — tolerates cold but no real frost. Curio Ficoides 'Mount Everest' shrugs off cold nights but a real, sustained freeze will kill it.

Concretely, for curio ficoides 'mount everest' as it gets too cold:

Down to roughly about 1 to 5 °C it copes, especially if dry and sheltered.
A sustained hard frost collapses the top growth; whether it returns depends on whether the roots, crown or tubers froze.
Wet cold is far more lethal than dry cold for this plant — soggy, frozen soil is the usual killer.

Can curio ficoides 'mount everest' go outside or overwinter — and where?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-11 (indoor in most US homes) or a frost-free UK microclimate.
In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter.
A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

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 curio ficoides 'mount everest' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H2 figure above.

Frost protection for borderline curio ficoides 'mount everest'

Curio Ficoides 'Mount Everest' is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost.
Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse.
Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones.
Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.

Curio Ficoides 'Mount Everest' hardiness — frequently asked questions

Is curio ficoides 'mount everest' cold hardy?

Curio Ficoides 'Mount Everest' is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Borderline outdoors. In its mild end of USDA 9-11 (indoor in most US homes) (and sheltered UK gardens) curio ficoides 'mount everest' can stay out; in colder areas it must be lifted, brought in, or treated as a frost-tender plant.

What is the minimum temperature curio ficoides 'mount everest' can survive?

Minimum survivable temperature is roughly about 1 to 5 °C — tolerates cold but no real frost. Curio Ficoides 'Mount Everest' shrugs off cold nights but a real, sustained freeze will kill it.

What hardiness zone is curio ficoides 'mount everest'?

Curio Ficoides 'Mount Everest' is rated USDA 9-11 (indoor in most US homes) and RHS H2 — Tender — survives a frost-free greenhouse or a very mild, sheltered spot.

Can curio ficoides 'mount everest' survive winter outside?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-11 (indoor in most US homes) or a frost-free UK microclimate. In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter. A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

How do I protect curio ficoides 'mount everest' from frost?

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost. Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse. Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones. Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.