Cold hardiness & minimum temperature

Is Fertility pear (Pyrus communis 'Fertility')cold hardy? Hardiness zone & min temp

Also called Fertility pear, Fertility Improved pear.

More about fertility pear

About Fertility pear

Pyrus communis 'Fertility' · also called Fertility pear, Fertility Improved pear · edible

An old English dessert and dual-purpose pear cultivar, 'Fertility' is notable for being partially self-fertile — useful in smaller gardens where space for multiple pollinators is limited. It bears medium-sized, russet-tinged fruits with sweet, juicy flesh ripening in September–October. Reliable, heavy-cropping, and tolerant of a range of soils and aspects.

Cold limit: USDA 4-8 · RHS H6 (-18 to 30°C)

Watch for — Pear midge (Contarinia pyrivora): Fruitlets turn black and fall early in June; larvae feed inside. Cultivate soil under the tree in winter to expose pupae to frost and birds. Apply a suitable insecticide (deltamethrin) at white-bud stage if infestation was severe the previous year.

What fertility pear's hardiness rating actually means

Yes — fertility pear is genuinely cold hardy. Rated RHS H6 and USDA 4-8, 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 4-8 — 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. Fertility pear is built for winter — once established it takes hard frost and snow in its stride.

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

Plant it out within USDA 4-8 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 fertility pear can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Fertility pear hardiness — frequently asked questions

Is fertility pear cold hardy?

Yes — fertility pear is genuinely cold hardy. Rated RHS H6 and USDA 4-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Fertility pear is hardy across USDA 4-8; 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 fertility pear can survive?

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

What hardiness zone is fertility pear?

Fertility pear is rated USDA 4-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can fertility pear survive winter outside?

Plant it out within USDA 4-8 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 fertility pear 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.