Cold hardiness & minimum temperature

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

Also called White Nancy Dead Nettle, White Nancy Spotted Dead Nettle, White Nancy Lamium.

More about white nancy dead nettle

About White Nancy Dead Nettle

Lamium maculatum 'White Nancy' · also called White Nancy Dead Nettle, White Nancy Spotted Dead Nettle · flowering

A low-growing, semi-evergreen perennial ground cover prized for its almost entirely silver-white leaves with a thin green margin and white spring flowers. Thrives in part to full shade in average, well-drained soil. Drought-tolerant once established; shear after flowering to tidy and promote reblooming. Hardy in USDA zones 3–8.

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

Watch for — Leaf scorch and dieback in summer heat: In USDA zones 7–8 or during hot, humid summers, plants may go summer-dormant and look tired. Cut back hard to 5 cm; they recover with cooler autumn temperatures.

What white nancy dead nettle's hardiness rating actually means

Yes — white nancy 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. White Nancy Dead Nettle is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for white nancy 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 white nancy 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 white nancy 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.

White Nancy Dead Nettle hardiness — frequently asked questions

Is white nancy dead nettle cold hardy?

Yes — white nancy 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. White Nancy 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 white nancy dead nettle can survive?

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

What hardiness zone is white nancy dead nettle?

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

Can white nancy 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 white nancy 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.