Cold hardiness & minimum temperature

Is Roller Jovibarba (Jovibarba globifera)cold hardy? Hardiness zone & min temp

Also called Roller Jovibarba, Globe Houseleek, Rolling Hen and Chicks.

More about roller jovibarba

About Roller Jovibarba

Jovibarba globifera · also called Roller Jovibarba, Globe Houseleek · houseplant

Jovibarba globifera is a compact alpine succulent native to central European mountains, famous for its globular, tightly wrapped offsets that detach and literally roll away to root elsewhere. Extremely cold-hardy and drought-tolerant, it suits rock gardens, green roofs, troughs, and sunny windowsills with minimal maintenance.

Cold limit: USDA 4–8 · RHS H7 (-25°C to 28°C)

What roller jovibarba's hardiness rating actually means

Yes — roller jovibarba is genuinely cold hardy. Rated RHS H7 and USDA 4–8, 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 4–8 — 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. Roller Jovibarba is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for roller jovibarba 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 roller jovibarba go outside or overwinter — and where?

Plant it out within USDA 4–8 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 roller jovibarba can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Roller Jovibarba hardiness — frequently asked questions

Is roller jovibarba cold hardy?

Yes — roller jovibarba is genuinely cold hardy. Rated RHS H7 and USDA 4–8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Roller Jovibarba is hardy across USDA 4–8; 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 roller jovibarba can survive?

Minimum survivable temperature is roughly below about −20 °C. Roller Jovibarba is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is roller jovibarba?

Roller Jovibarba is rated USDA 4–8 and RHS H7 — Hardy in the severest European continental winters.

Can roller jovibarba survive winter outside?

Plant it out within USDA 4–8 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 roller jovibarba 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.