Cold hardiness & minimum temperature

Is Miss Sharples Maidenhair Fern (Adiantum pedatum 'Miss Sharples')cold hardy? Hardiness zone & min temp

Also called Miss Sharples Maidenhair Fern, Miss Sharples Golden Maidenhair Fern, American Maidenhair Fern.

More about miss sharples maidenhair fern

About Miss Sharples Maidenhair Fern

Adiantum pedatum 'Miss Sharples' · also called Miss Sharples Maidenhair Fern, Miss Sharples Golden Maidenhair Fern · houseplant

A rare English selection of the native American maidenhair fern, 'Miss Sharples' produces delicate, finger-like fronds in soft chartreuse-yellow that are slightly broader than the straight species. Hardy enough for cool indoor conditions or sheltered outdoor shade, it rewards consistent moisture and indirect light with graceful, spreading growth and reliable seasonal renewal.

Cold limit: USDA 5–8 · RHS H5 (10–22°C)

Watch for — Frond tip browning: Low humidity and under-watering are the most common culprits. Remove browned fronds at the base and improve humidity; fresh fronds will emerge from the rhizome in spring if the plant overwinters successfully.

What miss sharples maidenhair fern's hardiness rating actually means

Yes — miss sharples maidenhair fern is genuinely cold hardy. Rated RHS H5 and USDA 5–8, 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 5–8 — 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 about −15 to −10 °C. Miss Sharples Maidenhair Fern is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for miss sharples maidenhair fern 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 miss sharples maidenhair fern go outside or overwinter — and where?

Plant it out within USDA 5–8 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 miss sharples maidenhair fern can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Miss Sharples Maidenhair Fern hardiness — frequently asked questions

Is miss sharples maidenhair fern cold hardy?

Yes — miss sharples maidenhair fern is genuinely cold hardy. Rated RHS H5 and USDA 5–8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Miss Sharples Maidenhair Fern is hardy across USDA 5–8; 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 miss sharples maidenhair fern can survive?

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

What hardiness zone is miss sharples maidenhair fern?

Miss Sharples Maidenhair Fern is rated USDA 5–8 and RHS H5 — Hardy in most of the UK and in cold winters.

Can miss sharples maidenhair fern survive winter outside?

Plant it out within USDA 5–8 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 miss sharples maidenhair fern 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.