Cold hardiness & minimum temperature

Is Lavender (Lavandula angustifolia)cold hardy? Hardiness zone & min temp

Also called English lavender, true lavender, common lavender.

About Lavender

Lavandula angustifolia · also called English lavender, true lavender · flowering

Lavender is a Mediterranean evergreen subshrub grown for fragrant purple flower spikes and silvery foliage. English lavender (L. angustifolia) is the most cold-hardy; French and Spanish types are more tender. Sun and sharp drainage are non-negotiable. Pet-safe in typical garden quantities.

Lavandula angustifolia (English lavender) originates in the mountainous western Mediterranean (Pyrenees, French Alps); the 'English' name reflects cultivation, not origin.

Trim annually in late summer just after flowering, removing spent flowers and about an inch of growth, to prevent the plant from becoming woody and leggy.

Cold limit: USDA 5-9 for English lavender; 7-9 for French and Spanish types · RHS H5 for L. angustifolia; H4 for L. stoechas (13-27°C)

Watch for — Browning after winter: Wet feet; lavender hates winter wet more than cold.

Sources: rhs.org.uk, plants.ces.ncsu.edu, extension.colostate.edu

What lavender's hardiness rating actually means

Yes — lavender is genuinely cold hardy. Rated RHS H5 and USDA 5-9 for English lavender; 7-9 for French and Spanish types, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 5-9 for English lavender; 7-9 for French and Spanish types — 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 −15 to −10 °C. Lavender is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for lavender as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 lavender go outside or overwinter — and where?

Plant it out within USDA 5-9 for English lavender; 7-9 for French and Spanish types 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 lavender can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Frost protection for borderline lavender

Lavender 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.

Lavender hardiness — frequently asked questions

Is lavender cold hardy?

Yes — lavender is genuinely cold hardy. Rated RHS H5 and USDA 5-9 for English lavender; 7-9 for French and Spanish types, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Lavender is hardy across USDA 5-9 for English lavender; 7-9 for French and Spanish types; 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 lavender can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Lavender is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is lavender?

Lavender is rated USDA 5-9 for English lavender; 7-9 for French and Spanish types and RHS H5 — Hardy in most of the UK and in cold winters.

Can lavender survive winter outside?

Plant it out within USDA 5-9 for English lavender; 7-9 for French and Spanish types 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 lavender 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.