Cold hardiness & minimum temperature

Is Chrysanthemum 'Yellow John Wingfield' (Chrysanthemum 'Yellow John Wingfield')cold hardy? Hardiness zone & min temp

Also called Yellow John Wingfield mum, exhibition chrysanthemum, incurved mum.

More about chrysanthemum 'yellow john wingfield'

About Chrysanthemum 'Yellow John Wingfield'

Chrysanthemum 'Yellow John Wingfield' · also called Yellow John Wingfield mum, exhibition chrysanthemum · flowering

A large-flowered exhibition chrysanthemum producing perfectly incurved yellow blooms of show quality in mid to late autumn. Bred for the show bench, it requires disbudding and staking. Toxic to cats, dogs, and horses. Popular among UK chrysanthemum societies for its precise incurved bloom form.

Cold limit: USDA 5-9 · RHS H4 (5-22°C)

What chrysanthemum 'yellow john wingfield''s hardiness rating actually means

Yes — chrysanthemum 'yellow john wingfield' is genuinely cold hardy. Rated RHS H4 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 5-9 — 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 −10 to −5 °C. Chrysanthemum 'Yellow John Wingfield' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for chrysanthemum 'yellow john wingfield' as it gets too cold:

It tolerates winter lows to about −10 to −5 °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 chrysanthemum 'yellow john wingfield' go outside or overwinter — and where?

Plant it out within USDA 5-9 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 chrysanthemum 'yellow john wingfield' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Chrysanthemum 'Yellow John Wingfield' hardiness — frequently asked questions

Is chrysanthemum 'yellow john wingfield' cold hardy?

Yes — chrysanthemum 'yellow john wingfield' is genuinely cold hardy. Rated RHS H4 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Chrysanthemum 'Yellow John Wingfield' is hardy across USDA 5-9; 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 chrysanthemum 'yellow john wingfield' can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Chrysanthemum 'Yellow John Wingfield' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is chrysanthemum 'yellow john wingfield'?

Chrysanthemum 'Yellow John Wingfield' is rated USDA 5-9 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can chrysanthemum 'yellow john wingfield' survive winter outside?

Plant it out within USDA 5-9 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 chrysanthemum 'yellow john wingfield' below its minimum temperature?

It tolerates winter lows to about −10 to −5 °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.