Cold hardiness & minimum temperature

Is Chinese Sweetgum (Liquidambar acalycina)cold hardy? Hardiness zone & min temp

Also called Chinese Sweetgum, Chinese Storax.

More about chinese sweetgum

About Chinese Sweetgum

Liquidambar acalycina · also called Chinese Sweetgum, Chinese Storax · flowering

A graceful deciduous tree from central and southern China, offering five- to seven-lobed glossy leaves that emerge bronze-purple in spring before turning deep green, then brilliant scarlet to burgundy in autumn. Slightly more compact than American sweetgum, it is increasingly popular in temperate gardens for its outstanding multi-season ornamental value and relatively pest-free nature.

Cold limit: USDA 6-9 · RHS H5 (-18 to 38°C)

Watch for — Sparse autumn colour in mild climates: Brilliant red autumn colour requires cool nights (below 10°C / 50°F) to develop fully. In very mild USDA zone 9 winters or sheltered urban settings, foliage may turn yellow-green rather than red.

What chinese sweetgum's hardiness rating actually means

Yes — chinese sweetgum is genuinely cold hardy. Rated RHS H5 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. 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 −15 to −10 °C. Chinese Sweetgum is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for chinese sweetgum as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 chinese sweetgum 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 chinese sweetgum can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Chinese Sweetgum hardiness — frequently asked questions

Is chinese sweetgum cold hardy?

Yes — chinese sweetgum is genuinely cold hardy. Rated RHS H5 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Chinese Sweetgum 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 chinese sweetgum can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Chinese Sweetgum is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is chinese sweetgum?

Chinese Sweetgum is rated USDA 6-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can chinese sweetgum 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 chinese sweetgum below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.