Cold hardiness & minimum temperature

Is Ussurian pear (Pyrus ussuriensis)cold hardy? Hardiness zone & min temp

Also called Ussurian pear, Manchurian pear, Chinese pear, Harbin pear.

More about ussurian pear

About Ussurian pear

Pyrus ussuriensis · also called Ussurian pear, Manchurian pear · edible

Pyrus ussuriensis is one of the hardiest pears in cultivation, tolerating temperatures to -40°C (-40°F), making it the species of choice for rootstock and breeding in extreme continental climates. Fruit is small, astringent fresh, and best cooked or used for rootstock purposes. Widely used as a fire-blight-tolerant, cold-hardy rootstock for grafting other pear cultivars.

Cold limit: USDA 3-7 · RHS H7 (-40 to 35°C)

Watch for — Astringent, unpalatable fresh fruit: The fruit of straight Pyrus ussuriensis is small (3–5 cm), gritty, and highly astringent when fresh — it softens and sweetens only after frost exposure ('bletting') or cooking. It is not a table pear; plant named cultivars or grafted varieties if edible fresh fruit is the goal.

What ussurian pear's hardiness rating actually means

Yes — ussurian pear is genuinely cold hardy. Rated RHS H7 and USDA 3-7, 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 3-7 — 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 below about −20 °C. Ussurian pear is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for ussurian pear 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 ussurian pear go outside or overwinter — and where?

Plant it out within USDA 3-7 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 ussurian pear can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Ussurian pear hardiness — frequently asked questions

Is ussurian pear cold hardy?

Yes — ussurian pear is genuinely cold hardy. Rated RHS H7 and USDA 3-7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Ussurian pear is hardy across USDA 3-7; 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 ussurian pear can survive?

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

What hardiness zone is ussurian pear?

Ussurian pear is rated USDA 3-7 and RHS H7 — Hardy in the severest European continental winters.

Can ussurian pear survive winter outside?

Plant it out within USDA 3-7 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 ussurian pear 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.