Cold hardiness & minimum temperature

Is Leucanthemum × superbum 'Snowcap' (Leucanthemum × superbum 'Snowcap')cold hardy? Hardiness zone & min temp

Also called Snowcap Shasta daisy, dwarf Shasta daisy.

More about leucanthemum × superbum 'snowcap'

About Leucanthemum × superbum 'Snowcap'

Leucanthemum × superbum 'Snowcap' · also called Snowcap Shasta daisy, dwarf Shasta daisy · flowering

'Snowcap' is a compact, sturdy Shasta daisy bred for windproof stems and a long midsummer-to-autumn run of crisp white single daisies with golden eyes. Reaching only about 40-45 cm, it needs no staking and is ideal for the front of a sunny border. Deadhead it and it reblooms reliably; divide every few years to keep it vigorous.

Cold limit: USDA 5-9 · RHS H7 (-29 to 30°C)

What leucanthemum × superbum 'snowcap''s hardiness rating actually means

Yes — leucanthemum × superbum 'snowcap' is genuinely cold hardy. Rated RHS H7 and USDA 5-9, 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 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 below about −20 °C. Leucanthemum × superbum 'Snowcap' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for leucanthemum × superbum 'snowcap' 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 leucanthemum × superbum 'snowcap' 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 leucanthemum × superbum 'snowcap' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Leucanthemum × superbum 'Snowcap' hardiness — frequently asked questions

Is leucanthemum × superbum 'snowcap' cold hardy?

Yes — leucanthemum × superbum 'snowcap' is genuinely cold hardy. Rated RHS H7 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Leucanthemum × superbum 'Snowcap' 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 leucanthemum × superbum 'snowcap' can survive?

Minimum survivable temperature is roughly below about −20 °C. Leucanthemum × superbum 'Snowcap' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is leucanthemum × superbum 'snowcap'?

Leucanthemum × superbum 'Snowcap' is rated USDA 5-9 and RHS H7 — Hardy in the severest European continental winters.

Can leucanthemum × superbum 'snowcap' 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 leucanthemum × superbum 'snowcap' 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.