Cold hardiness & minimum temperature

Is Deparia acrostichoides (Deparia acrostichoides)cold hardy? Hardiness zone & min temp

Also called Silvery Glade Fern, Silvery Spleenwort.

More about deparia acrostichoides

About Deparia acrostichoides

Deparia acrostichoides · also called Silvery Glade Fern, Silvery Spleenwort · flowering

Silvery glade fern is a tall, deciduous eastern North American woodland fern named for the silvery, hair-covered sori lining the undersides of its fronds. It forms upright, vase-shaped clumps of soft, lance-shaped, twice-divided fronds in rich, moist, shaded forest. Easy and elegant in the shade garden, it demands consistent moisture and humus-rich ground and dislikes drought and sun.

Cold limit: USDA 3-8 · RHS H6 (10-24°C)

What deparia acrostichoides's hardiness rating actually means

Yes — deparia acrostichoides is genuinely cold hardy. Rated RHS H6 and USDA 3-8, 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 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 about −20 to −15 °C. Deparia acrostichoides is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for deparia acrostichoides 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 deparia acrostichoides 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 deparia acrostichoides can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Deparia acrostichoides hardiness — frequently asked questions

Is deparia acrostichoides cold hardy?

Yes — deparia acrostichoides is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Deparia acrostichoides 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 deparia acrostichoides can survive?

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

What hardiness zone is deparia acrostichoides?

Deparia acrostichoides is rated USDA 3-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can deparia acrostichoides 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 deparia acrostichoides 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.