Cold hardiness & minimum temperature

Is Drosera anglica (Drosera anglica)cold hardy? Hardiness zone & min temp

Also called English Sundew, Great Sundew.

More about drosera anglica

About Drosera anglica

Drosera anglica · also called English Sundew, Great Sundew · flowering

Drosera anglica, the English or great sundew, is a cold-temperate, circumboreal carnivore with long, upright, spoon-tipped leaves studded in dewy tentacles. A true bog plant of the Northern Hemisphere, it demands a cold winter dormancy, permanently saturated acidic media, pure water, and bright light. It is more demanding than tropical sundews.

Cold limit: USDA 3-7 (cold-temperate bog; requires cold dormancy) · RHS H5 (15-25°C (growing); 0-7°C winter dormancy)

Watch for — Heat intolerance: This northern species sulks and rots in prolonged high heat. Keep summer temperatures moderate and provide cool, humid, airy conditions.

What drosera anglica's hardiness rating actually means

Yes — drosera anglica is genuinely cold hardy. Rated RHS H5 and USDA 3-7 (cold-temperate bog; requires cold dormancy), 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 3-7 (cold-temperate bog; requires cold dormancy) — 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. Drosera anglica is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for drosera anglica 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 drosera anglica go outside or overwinter — and where?

Plant it out within USDA 3-7 (cold-temperate bog; requires cold dormancy) 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 drosera anglica can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Drosera anglica hardiness — frequently asked questions

Is drosera anglica cold hardy?

Yes — drosera anglica is genuinely cold hardy. Rated RHS H5 and USDA 3-7 (cold-temperate bog; requires cold dormancy), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Drosera anglica is hardy across USDA 3-7 (cold-temperate bog; requires cold dormancy); 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 drosera anglica can survive?

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

What hardiness zone is drosera anglica?

Drosera anglica is rated USDA 3-7 (cold-temperate bog; requires cold dormancy) and RHS H5 — Hardy in most of the UK and in cold winters.

Can drosera anglica survive winter outside?

Plant it out within USDA 3-7 (cold-temperate bog; requires cold dormancy) 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 drosera anglica below its minimum temperature?

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.