Cold hardiness & minimum temperature

Is Honeyberry Blue Velvet (Lonicera caerulea 'Blue Velvet')cold hardy? Hardiness zone & min temp

Also called Blue Velvet honeyberry, haskap Blue Velvet.

More about honeyberry blue velvet

About Honeyberry Blue Velvet

Lonicera caerulea 'Blue Velvet' · also called Blue Velvet honeyberry, haskap Blue Velvet · edible

'Blue Velvet' is an extremely hardy honeyberry (haskap), a shrubby edible honeysuckle bearing elongated blue berries that taste like a blueberry-raspberry blend. Among the earliest fruits of the year, it shrugs off deep cold, tolerates a range of soils, and crops best when planted with a compatible second cultivar for cross-pollination.

Cold limit: USDA 2-7 · RHS H7 (-40 to 28°C)

Watch for — Early bloom and pollination gaps: Very early flowers can open before many pollinators are active in cold springs. Site in a sheltered spot and grow compatible cultivars that overlap in bloom.

What honeyberry blue velvet's hardiness rating actually means

Yes — honeyberry blue velvet is genuinely cold hardy. Rated RHS H7 and USDA 2-7, 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 2-7 — 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. Honeyberry Blue Velvet is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for honeyberry blue velvet 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 honeyberry blue velvet go outside or overwinter — and where?

Plant it out within USDA 2-7 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 honeyberry blue velvet can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Honeyberry Blue Velvet hardiness — frequently asked questions

Is honeyberry blue velvet cold hardy?

Yes — honeyberry blue velvet is genuinely cold hardy. Rated RHS H7 and USDA 2-7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Honeyberry Blue Velvet is hardy across USDA 2-7; 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 honeyberry blue velvet can survive?

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

What hardiness zone is honeyberry blue velvet?

Honeyberry Blue Velvet is rated USDA 2-7 and RHS H7 — Hardy in the severest European continental winters.

Can honeyberry blue velvet survive winter outside?

Plant it out within USDA 2-7 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 honeyberry blue velvet 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.