Cold hardiness & minimum temperature

Is King Alfred Daffodil (Narcissus pseudonarcissus 'King Alfred')cold hardy? Hardiness zone & min temp

Also called King Alfred Daffodil, King Alfred, Golden King Alfred.

More about king alfred daffodil

About King Alfred Daffodil

Narcissus pseudonarcissus 'King Alfred' · also called King Alfred Daffodil, King Alfred · flowering

Narcissus 'King Alfred' is the archetypal golden trumpet daffodil — a large, all-yellow Division 1 cultivar with broad petals and a long, flared trumpet of the same rich golden colour. Introduced in 1899 and still one of the most recognized daffodils worldwide, it naturalizes vigorously in borders and lawns, returning reliably each spring.

Cold limit: USDA 3-8 · RHS H7 (−25°C to 20°C)

What king alfred daffodil's hardiness rating actually means

Yes — king alfred daffodil is genuinely cold hardy. Rated RHS H7 and USDA 3-8, 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 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 below about −20 °C. King Alfred Daffodil is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for king alfred daffodil 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 king alfred daffodil 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 king alfred daffodil can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

King Alfred Daffodil hardiness — frequently asked questions

Is king alfred daffodil cold hardy?

Yes — king alfred daffodil is genuinely cold hardy. Rated RHS H7 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. King Alfred Daffodil 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 king alfred daffodil can survive?

Minimum survivable temperature is roughly below about −20 °C. King Alfred Daffodil is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is king alfred daffodil?

King Alfred Daffodil is rated USDA 3-8 and RHS H7 — Hardy in the severest European continental winters.

Can king alfred daffodil 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 king alfred daffodil 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.