Cold hardiness & minimum temperature

Is Narcissus 'Hawera' (Narcissus 'Hawera')cold hardy? Hardiness zone & min temp

Also called Hawera daffodil, triandrus daffodil, pale yellow miniature daffodil.

More about narcissus 'hawera'

About Narcissus 'Hawera'

Narcissus 'Hawera' · also called Hawera daffodil, triandrus daffodil · flowering

Narcissus 'Hawera' is a dainty Triandrus daffodil bearing up to six nodding, pale lemon-yellow flowers with reflexed petals per stem in mid to late spring. Reaching only 15-20 cm, it naturalises beautifully in rock gardens, borders and pots. Plant bulbs in autumn for spring colour. All parts are toxic to pets.

Cold limit: USDA 3-9 · RHS H6 (-15 to 24°C)

What narcissus 'hawera''s hardiness rating actually means

Yes — narcissus 'hawera' is genuinely cold hardy. Rated RHS H6 and USDA 3-9, 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 3-9 — 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. Narcissus 'Hawera' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for narcissus 'hawera' 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 narcissus 'hawera' go outside or overwinter — and where?

Plant it out within USDA 3-9 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 narcissus 'hawera' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Narcissus 'Hawera' hardiness — frequently asked questions

Is narcissus 'hawera' cold hardy?

Yes — narcissus 'hawera' is genuinely cold hardy. Rated RHS H6 and USDA 3-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Narcissus 'Hawera' is hardy across USDA 3-9; 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 narcissus 'hawera' can survive?

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

What hardiness zone is narcissus 'hawera'?

Narcissus 'Hawera' is rated USDA 3-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can narcissus 'hawera' survive winter outside?

Plant it out within USDA 3-9 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 narcissus 'hawera' 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.