Cold hardiness & minimum temperature

Is Netted Chain Fern (Lorinseria areolata)cold hardy? Hardiness zone & min temp

Also called Netted Chain Fern, Net-veined Chain Fern.

More about netted chain fern

About Netted Chain Fern

Lorinseria areolata · also called Netted Chain Fern, Net-veined Chain Fern · flowering

The netted chain fern, Lorinseria areolata, is a deciduous North American wetland fern that spreads by creeping rhizomes to form colonies in acidic, boggy ground. Its sterile fronds resemble a small sensitive fern, with a distinctive net-veined pattern, while the slender fertile fronds stand erect. Ideal for pond margins and rain gardens in shade.

Cold limit: USDA 4-9 (deciduous, dying back in winter) · RHS H6 (13-27°C)

What netted chain fern's hardiness rating actually means

Yes — netted chain fern is genuinely cold hardy. Rated RHS H6 and USDA 4-9 (deciduous, dying back in winter), 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 (deciduous, dying back in winter) — 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. Netted Chain Fern is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for netted chain fern 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 netted chain fern go outside or overwinter — and where?

Plant it out within USDA 4-9 (deciduous, dying back in winter) 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 netted chain fern can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Netted Chain Fern hardiness — frequently asked questions

Is netted chain fern cold hardy?

Yes — netted chain fern is genuinely cold hardy. Rated RHS H6 and USDA 4-9 (deciduous, dying back in winter), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Netted Chain Fern is hardy across USDA 4-9 (deciduous, dying back in winter); 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 netted chain fern can survive?

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

What hardiness zone is netted chain fern?

Netted Chain Fern is rated USDA 4-9 (deciduous, dying back in winter) and RHS H6 — Hardy throughout the UK and northern Europe.

Can netted chain fern survive winter outside?

Plant it out within USDA 4-9 (deciduous, dying back in winter) 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 netted chain fern 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.