Cold hardiness & minimum temperature

Is Loquat (Eriobotrya japonica)cold hardy? Hardiness zone & min temp

Also called Loquat, Japanese medlar, Japanese plum.

More about loquat

About Loquat

Eriobotrya japonica · also called Loquat, Japanese medlar · tropical

Loquat is a subtropical evergreen tree in the rose family, grown for its large leathery leaves and clusters of sweet-tart orange fruit that ripen in late winter to spring. Unusually, it flowers in autumn and fruits in cool months. Hardy to around -10°C as a tree, it is widely grown outdoors in mild regions and as an ornamental elsewhere.

Cold limit: USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C) · RHS H4 (15-30°C)

Watch for — Frost-damaged blossom and fruit: Because loquat flowers and fruits in cold months, hard frost can destroy the crop even where the tree itself survives. Site in a sheltered, sunny spot and protect young fruit during cold snaps.

What loquat's hardiness rating actually means

Yes — loquat is genuinely cold hardy. Rated RHS H4 and USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C), 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 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C) — 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. Loquat is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for loquat 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 loquat go outside or overwinter — and where?

Plant it out within USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C) 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 loquat can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Loquat hardiness — frequently asked questions

Is loquat cold hardy?

Yes — loquat is genuinely cold hardy. Rated RHS H4 and USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Loquat is hardy across USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C); 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 loquat can survive?

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

What hardiness zone is loquat?

Loquat is rated USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C) and RHS H4 — Hardy in an average winter across much of the temperate world.

Can loquat survive winter outside?

Plant it out within USDA 8-10 (tree hardy to about -10°C; flowers and fruit damaged below roughly -3 to -7°C) 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 loquat 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.