Cold hardiness & minimum temperature

Is Beacon Silver Dead Nettle (Lamium maculatum 'Beacon Silver')cold hardy? Hardiness zone & min temp

Also called Beacon Silver Dead Nettle, Beacon Silver Spotted Dead Nettle, Beacon Silver Lamium.

More about beacon silver dead nettle

About Beacon Silver Dead Nettle

Lamium maculatum 'Beacon Silver' · also called Beacon Silver Dead Nettle, Beacon Silver Spotted Dead Nettle · flowering

A vigorous, mat-forming perennial ground cover with striking silvery-grey leaves edged in green and clusters of mauve-pink flowers in spring and early summer. More tolerant of sun than many silver-leaved Lamiums. Excellent for shady borders and under trees. Shear after flowering to refresh foliage and encourage rebloom.

Cold limit: USDA 3-8 · RHS H7 (-34°C to 29°C)

What beacon silver dead nettle's hardiness rating actually means

Yes — beacon silver dead nettle is genuinely cold hardy. Rated RHS H7 and USDA 3-8, 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 3-8 — 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. Beacon Silver Dead Nettle is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for beacon silver dead nettle 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 beacon silver dead nettle go outside or overwinter — and where?

Plant it out within USDA 3-8 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 beacon silver dead nettle can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Beacon Silver Dead Nettle hardiness — frequently asked questions

Is beacon silver dead nettle cold hardy?

Yes — beacon silver dead nettle is genuinely cold hardy. Rated RHS H7 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Beacon Silver Dead Nettle is hardy across USDA 3-8; 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 beacon silver dead nettle can survive?

Minimum survivable temperature is roughly below about −20 °C. Beacon Silver Dead Nettle is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is beacon silver dead nettle?

Beacon Silver Dead Nettle is rated USDA 3-8 and RHS H7 — Hardy in the severest European continental winters.

Can beacon silver dead nettle survive winter outside?

Plant it out within USDA 3-8 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 beacon silver dead nettle 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.