Cold hardiness & minimum temperature

Is Gmelin's Sea Lavender (Limonium gmelinii)cold hardy? Hardiness zone & min temp

Also called Gmelin's sea lavender, Siberian statice.

More about gmelin's sea lavender

About Gmelin's Sea Lavender

Limonium gmelinii · also called Gmelin's sea lavender, Siberian statice · flowering

Limonium gmelinii is a hardy herbaceous perennial native to a broad range spanning east-central and southeastern Europe, Russia, the north Caucasus, Turkey, Kazakhstan, and Siberia, where it grows in saline steppes, salt meadows, and roadsides. It forms a basal rosette of leathery leaves and produces airy panicles of small lavender-blue flowers in summer on wiry, branched stems. Among the hardiest Limonium species, it tolerates extreme cold and is well-suited to UK gardens as well as cold-winter climates in the US. Limonium is non-toxic to cats and dogs according to the ASPCA.

Cold limit: USDA 4-9 · RHS H7 (-30°C to 35°C)

Watch for — Winter wet / crown rot: Despite being extremely cold-hardy, Gmelin's sea lavender is poorly adapted to wet, heavy soils in winter; waterlogging kills roots rapidly. Always ensure free drainage, especially on clay-based garden soils.

What gmelin's sea lavender's hardiness rating actually means

Yes — gmelin's sea lavender is genuinely cold hardy. Rated RHS H7 and USDA 4-9, 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 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 below about −20 °C. Gmelin's Sea Lavender is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for gmelin's sea lavender 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 gmelin's sea lavender 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 gmelin's sea lavender can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Gmelin's Sea Lavender hardiness — frequently asked questions

Is gmelin's sea lavender cold hardy?

Yes — gmelin's sea lavender is genuinely cold hardy. Rated RHS H7 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Gmelin's Sea Lavender 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 gmelin's sea lavender can survive?

Minimum survivable temperature is roughly below about −20 °C. Gmelin's Sea Lavender is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is gmelin's sea lavender?

Gmelin's Sea Lavender is rated USDA 4-9 and RHS H7 — Hardy in the severest European continental winters.

Can gmelin's sea lavender 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 gmelin's sea lavender 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.