Cold hardiness & minimum temperature

Is Dwarf Cedar of Lebanon (Cedrus libani 'Nana')cold hardy? Hardiness zone & min temp

Also called Dwarf Cedar of Lebanon, Compact Cedar of Lebanon.

More about dwarf cedar of lebanon

About Dwarf Cedar of Lebanon

Cedrus libani 'Nana' · also called Dwarf Cedar of Lebanon, Compact Cedar of Lebanon · houseplant

A dense, slow-growing dwarf cultivar of the Cedar of Lebanon, a species native to the Taurus and Lebanon mountain ranges. It forms a tight, irregular mound with stiff, dark-green needles and an architectural quality that suits rock gardens and formal borders. It is one of the hardiest true cedars, tolerating considerable cold, but insists on full sun and sharply drained soil. Cedrus libani is not toxic to cats or dogs.

Cold limit: USDA 5-7 · RHS H6 (-25 to 35°C)

What dwarf cedar of lebanon's hardiness rating actually means

Yes — dwarf cedar of lebanon is genuinely cold hardy. Rated RHS H6 and USDA 5-7, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 5-7 — 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 −20 to −15 °C. Dwarf Cedar of Lebanon is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for dwarf cedar of lebanon as it gets too cold:

It tolerates winter lows to about −20 to −15 °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 dwarf cedar of lebanon go outside or overwinter — and where?

Plant it out within USDA 5-7 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 dwarf cedar of lebanon can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Dwarf Cedar of Lebanon hardiness — frequently asked questions

Is dwarf cedar of lebanon cold hardy?

Yes — dwarf cedar of lebanon is genuinely cold hardy. Rated RHS H6 and USDA 5-7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Dwarf Cedar of Lebanon is hardy across USDA 5-7; 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 dwarf cedar of lebanon can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Dwarf Cedar of Lebanon is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is dwarf cedar of lebanon?

Dwarf Cedar of Lebanon is rated USDA 5-7 and RHS H6 — Hardy throughout the UK and northern Europe.

Can dwarf cedar of lebanon survive winter outside?

Plant it out within USDA 5-7 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 dwarf cedar of lebanon below its minimum temperature?

It tolerates winter lows to about −20 to −15 °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.