Cold hardiness & minimum temperature

Is Olive Living Stones (Lithops olivacea)cold hardy? Hardiness zone & min temp

Also called Olive Living Stones, Olive Pebble Plant.

More about olive living stones

About Olive Living Stones

Lithops olivacea · also called Olive Living Stones, Olive Pebble Plant · houseplant

Lithops olivacea is a small, olive-green to dark green South African stone mimic from the Northern Cape. Its relatively uniform, darkly pigmented top surface with subtle windowing makes it one of the most realistic rock impersonators in the genus. It follows the same strict seasonal care cycle as all Lithops, requiring full sun and seasonal drought.

Cold limit: USDA 10-11 · RHS H1b (8–40°C)

Watch for — Sunscald after indoor winter: The dark olive surface absorbs heat readily and can scorch if moved suddenly from an indoor position to full outdoor sun in spring. Acclimatise over 1–2 weeks by starting with morning sun only.

What olive living stones's hardiness rating actually means

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

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

Olive Living Stones hardiness — frequently asked questions

Is olive living stones cold hardy?

Olive Living Stones 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. Olive Living Stones can only live outside year-round in genuinely frost-free climates (roughly USDA 10-11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature olive living stones can survive?

What hardiness zone is olive living stones?

Olive Living Stones is rated USDA 10-11 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can olive living stones 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 olive living stones 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.