Cold hardiness & minimum temperature

Is Conophytum (Living Pebbles) (Conophytum bilobum)cold hardy? Hardiness zone & min temp

Also called Living pebbles, Living stones, Cone plant, Button plant, Conophytum.

More about conophytum (living pebbles)

About Conophytum (Living Pebbles)

Conophytum bilobum · also called Living pebbles, Living stones · houseplant

Conophytum bilobum is a tiny South African mesemb that mimics paired pebbles to dodge grazers. It is a summer-dormant succulent: grow it bright and nearly dry, watering mainly autumn to spring, and it rewards you with yellow-orange daisy-like flowers in fall. It is not individually ASPCA-listed, so verify pet safety with a vet.

Cold limit: USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this. (18-24C)

What conophytum (living pebbles)'s hardiness rating actually means

Yes — conophytum (living pebbles) is genuinely cold hardy. Rated RHS H7 and USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this., it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this. — 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 below about −20 °C. Conophytum (Living Pebbles) is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for conophytum (living pebbles) as it gets too cold:

It tolerates winter lows to about −20 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can conophytum (living pebbles) go outside or overwinter — and where?

Plant it out within USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this. and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

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 conophytum (living pebbles) can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Conophytum (Living Pebbles) hardiness — frequently asked questions

Is conophytum (living pebbles) cold hardy?

Yes — conophytum (living pebbles) is genuinely cold hardy. Rated RHS H7 and USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this., it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Conophytum (Living Pebbles) is hardy across USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this.; it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature conophytum (living pebbles) can survive?

Minimum survivable temperature is roughly below about −20 °C. Conophytum (Living Pebbles) is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is conophytum (living pebbles)?

Conophytum (Living Pebbles) is rated USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this. and RHS H7 — Hardy in the severest European continental winters.

Can conophytum (living pebbles) survive winter outside?

Plant it out within USDA USDA 10b-11b (minimum roughly 1.7C / 35F); grow indoors or under cover where temperatures drop below this. and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to conophytum (living pebbles) below its minimum temperature?

It tolerates winter lows to about −20 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.