Cold hardiness & minimum temperature

Is Hoop Petticoat Daffodil (Narcissus bulbocodium)cold hardy? Hardiness zone & min temp

Also called Hoop Petticoat Daffodil, Petticoat Daffodil.

More about hoop petticoat daffodil

About Hoop Petticoat Daffodil

Narcissus bulbocodium · also called Hoop Petticoat Daffodil, Petticoat Daffodil · flowering

Narcissus bulbocodium is a diminutive daffodil species with distinctive funnel-shaped, wide coronas and tiny petals — resembling a hoop petticoat. Ideal for naturalizing in grass, rock gardens, or alpine troughs, it thrives in free-draining soil and full sun. Plant bulbs in autumn for cheerful late-winter to early-spring blooms.

Cold limit: USDA 6-9 · RHS H6 (−15°C to 18°C (active growth); requires winter chill)

What hoop petticoat daffodil's hardiness rating actually means

Yes — hoop petticoat daffodil is genuinely cold hardy. Rated RHS H6 and USDA 6-9, 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 6-9 — 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 about −20 to −15 °C. Hoop Petticoat Daffodil is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for hoop petticoat daffodil 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 hoop petticoat daffodil go outside or overwinter — and where?

Plant it out within USDA 6-9 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 hoop petticoat daffodil can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Hoop Petticoat Daffodil hardiness — frequently asked questions

Is hoop petticoat daffodil cold hardy?

Yes — hoop petticoat daffodil is genuinely cold hardy. Rated RHS H6 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Hoop Petticoat Daffodil is hardy across USDA 6-9; 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 hoop petticoat daffodil can survive?

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

What hardiness zone is hoop petticoat daffodil?

Hoop Petticoat Daffodil is rated USDA 6-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can hoop petticoat daffodil survive winter outside?

Plant it out within USDA 6-9 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 hoop petticoat daffodil 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.