Cold hardiness & minimum temperature

Is Gold Dew Tufted Hair Grass (Deschampsia cespitosa 'Goldtau')cold hardy? Hardiness zone & min temp

Also called Gold dew tufted hair grass, Goldtau hair grass, Golden dew tufted hair grass.

More about gold dew tufted hair grass

About Gold Dew Tufted Hair Grass

Deschampsia cespitosa 'Goldtau' · also called Gold dew tufted hair grass, Goldtau hair grass · flowering

Deschampsia cespitosa 'Goldtau' (meaning 'golden dew' in German) is an outstanding cultivar of tufted hair grass, a cool-season perennial grass native to meadows, moorland, and woodland edges across Europe, northern Asia, and North America. 'Goldtau' is prized for its massive clouds of golden-yellow summer flower panicles that catch and hold dew, glowing when backlit. It thrives in cool, moist conditions and grows actively in spring and autumn rather than the heat of summer. Deschampsia species are not listed as toxic to cats or dogs by the ASPCA.

Cold limit: USDA 4-9 · RHS H7 (-25 to 28°C)

What gold dew tufted hair grass's hardiness rating actually means

Yes — gold dew tufted hair grass is genuinely cold hardy. Rated RHS H7 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA 4-9 — 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 below about −20 °C. Gold Dew Tufted Hair Grass is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for gold dew tufted hair grass as it gets too cold:

It tolerates winter lows to about −20 °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 gold dew tufted hair grass go outside or overwinter — and where?

Plant it out within USDA 4-9 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 gold dew tufted hair grass can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Gold Dew Tufted Hair Grass hardiness — frequently asked questions

Is gold dew tufted hair grass cold hardy?

Yes — gold dew tufted hair grass is genuinely cold hardy. Rated RHS H7 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Gold Dew Tufted Hair Grass is hardy across USDA 4-9; 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 gold dew tufted hair grass can survive?

Minimum survivable temperature is roughly below about −20 °C. Gold Dew Tufted Hair Grass is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is gold dew tufted hair grass?

Gold Dew Tufted Hair Grass is rated USDA 4-9 and RHS H7 — Hardy in the severest European continental winters.

Can gold dew tufted hair grass survive winter outside?

Plant it out within USDA 4-9 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 gold dew tufted hair grass below its minimum temperature?

It tolerates winter lows to about −20 °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.