Cold hardiness & minimum temperature

Is Foxglove 'Camelot Lavender' (Digitalis purpurea)cold hardy? Hardiness zone & min temp

Also called Camelot lavender foxglove, Common foxglove, Fairy thimbles.

More about foxglove 'camelot lavender'

About Foxglove 'Camelot Lavender'

Digitalis purpurea · also called Camelot lavender foxglove, Common foxglove · flowering

A showy biennial or short-lived perennial foxglove producing tall spikes of large, lavender-purple tubular flowers with contrasting spotted throats in early to midsummer. Part of the Camelot series with outward-facing blooms on tall, sturdy stems. Highly toxic to humans, pets, and livestock — all parts contain cardiac glycosides.

Cold limit: USDA 4–9 · RHS H6 (−15–30°C)

Watch for — Crown rot: Overwintering rosettes can rot in waterlogged soil. Improve drainage or grow in raised beds.

What foxglove 'camelot lavender''s hardiness rating actually means

Yes — foxglove 'camelot lavender' is genuinely cold hardy. Rated RHS H6 and USDA 4–9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. 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 about −20 to −15 °C. Foxglove 'Camelot Lavender' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for foxglove 'camelot lavender' as it gets too cold:

It tolerates winter lows to about −20 to −15 °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 foxglove 'camelot 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 foxglove 'camelot lavender' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Foxglove 'Camelot Lavender' hardiness — frequently asked questions

Is foxglove 'camelot lavender' cold hardy?

Yes — foxglove 'camelot lavender' is genuinely cold hardy. Rated RHS H6 and USDA 4–9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Foxglove 'Camelot 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 foxglove 'camelot lavender' can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Foxglove 'Camelot Lavender' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is foxglove 'camelot lavender'?

Foxglove 'Camelot Lavender' is rated USDA 4–9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can foxglove 'camelot 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 foxglove 'camelot lavender' below its minimum temperature?

It tolerates winter lows to about −20 to −15 °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.