Cold hardiness & minimum temperature

Is Lang Jujube (Ziziphus jujuba 'Lang')cold hardy? Hardiness zone & min temp

Also called Lang jujube, Chinese date Lang.

More about lang jujube

About Lang Jujube

Ziziphus jujuba 'Lang' · also called Lang jujube, Chinese date Lang · edible

'Lang' is a classic jujube cultivar bearing pear-shaped, reddish-brown fruit best dried, when it develops a rich, date-like sweetness. A heat-loving, drought-tolerant deciduous tree, it crops most heavily when cross-pollinated by 'Li'. Like all jujubes it shrugs off poor, alkaline, saline soil and arid heat, making it productive where conventional fruit trees struggle.

Cold limit: USDA 6-9 · RHS H4 (-20 to 40C (growing optimum 25-38C))

What lang jujube's hardiness rating actually means

Yes — lang jujube is genuinely cold hardy. Rated RHS H4 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 6-9 — 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 to −5 °C. Lang Jujube is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for lang jujube as it gets too cold:

It tolerates winter lows to about −10 to −5 °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 lang jujube go outside or overwinter — and where?

Plant it out within USDA 6-9 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 lang jujube can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Lang Jujube hardiness — frequently asked questions

Is lang jujube cold hardy?

Yes — lang jujube is genuinely cold hardy. Rated RHS H4 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Lang Jujube is hardy across USDA 6-9; 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 lang jujube can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Lang Jujube is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is lang jujube?

Lang Jujube is rated USDA 6-9 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can lang jujube survive winter outside?

Plant it out within USDA 6-9 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 lang jujube below its minimum temperature?

It tolerates winter lows to about −10 to −5 °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.