Cold hardiness & minimum temperature

Is Barbecue Rosemary (Rosmarinus officinalis 'Barbecue')cold hardy? Hardiness zone & min temp

Also called Barbecue Rosemary, BBQ Rosemary.

More about barbecue rosemary

About Barbecue Rosemary

Rosmarinus officinalis 'Barbecue' · also called Barbecue Rosemary, BBQ Rosemary · herb

Barbecue Rosemary is an upright, vigorous rosemary cultivar selected for its straight, robust stems — ideal for use as grilling skewers — and intensely aromatic, resinous foliage. It forms a dense, columnar shrub in full sun and well-drained soil. Highly drought-tolerant once established; excellent for culinary and ornamental use.

Cold limit: USDA 7-11 · RHS H4 (-10 to 38°C)

Watch for — Rosemary beetle (Chrysolina americana): Metallic green-and-purple beetles and their larvae skeletonize foliage from late summer through winter in the UK and warm US regions. Check stems regularly and pick off adults and larvae by hand. Pyrethrum-based sprays offer control if infestations are severe.

What barbecue rosemary's hardiness rating actually means

Yes — barbecue rosemary is genuinely cold hardy. Rated RHS H4 and USDA 7-11, 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 7-11 — 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. Barbecue Rosemary is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for barbecue rosemary 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 barbecue rosemary go outside or overwinter — and where?

Plant it out within USDA 7-11 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 barbecue rosemary can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Frost protection for borderline barbecue rosemary

Barbecue Rosemary is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

At the cold edge of its range, mulch the root zone in late autumn to buffer the deepest freezes.
Protect container specimens — pots freeze through far faster than open ground, costing roughly a zone of hardiness.
Shelter new growth from late spring frosts with fleece if a hard night is forecast.

Barbecue Rosemary hardiness — frequently asked questions

Is barbecue rosemary cold hardy?

Yes — barbecue rosemary is genuinely cold hardy. Rated RHS H4 and USDA 7-11, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Barbecue Rosemary is hardy across USDA 7-11; 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 barbecue rosemary can survive?

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

What hardiness zone is barbecue rosemary?

Barbecue Rosemary is rated USDA 7-11 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can barbecue rosemary survive winter outside?

Plant it out within USDA 7-11 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.

How do I protect barbecue rosemary from frost?

At the cold edge of its range, mulch the root zone in late autumn to buffer the deepest freezes. Protect container specimens — pots freeze through far faster than open ground, costing roughly a zone of hardiness. Shelter new growth from late spring frosts with fleece if a hard night is forecast.