Cold hardiness & minimum temperature

Is Chinese Mulberry (Morus cathayana)cold hardy? Hardiness zone & min temp

Also called Chinese Mulberry, Cathay Mulberry.

More about chinese mulberry

About Chinese Mulberry

Morus cathayana · also called Chinese Mulberry, Cathay Mulberry · edible

Chinese Mulberry is a large, vigorous deciduous tree from central and eastern China, notable for its exceptionally large leaves and generous crops of sweet, dark-purple to black fruits. Less commonly cultivated than Morus alba or M. nigra, it is valued by specialist growers for its distinctive fruit flavour and ornamental bold foliage. Hardy and adaptable in temperate gardens.

Cold limit: USDA 5-9 · RHS H6 (-20 to 38°C)

Watch for — Wind damage to large leaves: The exceptionally large leaves are prone to wind tearing and shredding in exposed positions, which reduces photosynthetic efficiency and ornamental appeal. Plant in a sheltered location or use nearby windbreak planting. Avoid frost-pocket sites where late frosts can damage new growth.

What chinese mulberry's hardiness rating actually means

Yes — chinese mulberry is genuinely cold hardy. Rated RHS H6 and USDA 5-9, 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 5-9 — 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 −20 to −15 °C. Chinese Mulberry is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for chinese mulberry 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 chinese mulberry go outside or overwinter — and where?

Plant it out within USDA 5-9 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 mulberry can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Chinese Mulberry hardiness — frequently asked questions

Is chinese mulberry cold hardy?

Yes — chinese mulberry is genuinely cold hardy. Rated RHS H6 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Chinese Mulberry is hardy across USDA 5-9; 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 mulberry can survive?

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

What hardiness zone is chinese mulberry?

Chinese Mulberry is rated USDA 5-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can chinese mulberry survive winter outside?

Plant it out within USDA 5-9 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 mulberry 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.