Cold hardiness & minimum temperature

Is Lonicera periclymenum 'Serotina' (Lonicera periclymenum 'Serotina')cold hardy? Hardiness zone & min temp

Also called late Dutch honeysuckle, late flowering woodbine.

More about lonicera periclymenum 'serotina'

About Lonicera periclymenum 'Serotina'

Lonicera periclymenum 'Serotina' · also called late Dutch honeysuckle, late flowering woodbine · flowering

Lonicera periclymenum 'Serotina', the late Dutch honeysuckle, is a popular garden cultivar of common honeysuckle prized for richly fragrant flowers, deep red-purple in bud opening to creamy interiors, carried later and longer than the species. A hardy, easy deciduous twiner, it scents summer evenings, draws pollinators and clothes trellis, arches and walls with bloom.

Cold limit: USDA 4-9 · RHS H6 (-20 to 28°C)

What lonicera periclymenum 'serotina''s hardiness rating actually means

Yes — lonicera periclymenum 'serotina' is genuinely cold hardy. Rated RHS H6 and USDA 4-9, 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 4-9 — 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. Lonicera periclymenum 'Serotina' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for lonicera periclymenum 'serotina' 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 lonicera periclymenum 'serotina' go outside or overwinter — and where?

Plant it out within USDA 4-9 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 lonicera periclymenum 'serotina' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Lonicera periclymenum 'Serotina' hardiness — frequently asked questions

Is lonicera periclymenum 'serotina' cold hardy?

Yes — lonicera periclymenum 'serotina' is genuinely cold hardy. Rated RHS H6 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Lonicera periclymenum 'Serotina' is hardy across USDA 4-9; 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 lonicera periclymenum 'serotina' can survive?

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

What hardiness zone is lonicera periclymenum 'serotina'?

Lonicera periclymenum 'Serotina' is rated USDA 4-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can lonicera periclymenum 'serotina' survive winter outside?

Plant it out within USDA 4-9 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 lonicera periclymenum 'serotina' 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.