Cold hardiness & minimum temperature

Is Resurrection Gesneriad (Haberlea rhodopensis)cold hardy? Hardiness zone & min temp

Also called resurrection gesneriad, Orpheus flower, resurrection plant.

More about resurrection gesneriad

About Resurrection Gesneriad

Haberlea rhodopensis · also called resurrection gesneriad, Orpheus flower · houseplant

A Balkan glacial relic and one of the few true resurrection plants — capable of surviving near-complete desiccation for years and reviving within hours of rehydration. Forms elegant rosettes of crinkled, softly hairy leaves bearing pale lavender tubular flowers in spring. Best grown in shaded crevices with humus-rich, gritty soil and excellent drainage.

Cold limit: USDA 4–7 · RHS H5 (2–20 °C)

Watch for — Crown rot in winter wet: The biggest cultivation risk: water pooling in the rosette centre during cold, damp winters causes rapid crown rot. Grow plants tilted on their sides in a rock crevice or raised bed, or protect with a glass or open-sided cloche in wet climates.

What resurrection gesneriad's hardiness rating actually means

Yes — resurrection gesneriad is genuinely cold hardy. Rated RHS H5 and USDA 4–7, 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 4–7 — 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. Resurrection Gesneriad is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for resurrection gesneriad 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 resurrection gesneriad go outside or overwinter — and where?

Plant it out within USDA 4–7 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 resurrection gesneriad can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Resurrection Gesneriad hardiness — frequently asked questions

Is resurrection gesneriad cold hardy?

Yes — resurrection gesneriad is genuinely cold hardy. Rated RHS H5 and USDA 4–7, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Resurrection Gesneriad is hardy across USDA 4–7; 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 resurrection gesneriad can survive?

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

What hardiness zone is resurrection gesneriad?

Resurrection Gesneriad is rated USDA 4–7 and RHS H5 — Hardy in most of the UK and in cold winters.

Can resurrection gesneriad survive winter outside?

Plant it out within USDA 4–7 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 resurrection gesneriad 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.