Cold hardiness & minimum temperature

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

Also called Silver Princess Shasta daisy, Silberprinzesschen daisy.

More about leucanthemum × superbum 'silver princess'

About Leucanthemum × superbum 'Silver Princess'

Leucanthemum × superbum 'Silver Princess' · also called Silver Princess Shasta daisy, Silberprinzesschen daisy · flowering

'Silver Princess' is a dwarf, compact Shasta daisy smothered in classic white single daisies with bright yellow centres from early summer to autumn. At roughly 25-40 cm it suits border edges, containers and cut flowers. Long-flowering if deadheaded, it forms tidy mounds, asks only for sun and good drainage, and is among the freest-blooming of the dwarf selections.

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

Watch for — Crown rot in wet soil: Poor winter drainage rots the crown. Plant in free-draining soil or raised ground, and avoid mulching directly over the crown.

What leucanthemum × superbum 'silver princess''s hardiness rating actually means

Yes — leucanthemum × superbum 'silver princess' 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 'Silver Princess' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for leucanthemum × superbum 'silver princess' 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 'silver princess' 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 'silver princess' 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 'Silver Princess' hardiness — frequently asked questions

Is leucanthemum × superbum 'silver princess' cold hardy?

Yes — leucanthemum × superbum 'silver princess' 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 'Silver Princess' 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 'silver princess' can survive?

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

What hardiness zone is leucanthemum × superbum 'silver princess'?

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

Can leucanthemum × superbum 'silver princess' 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 'silver princess' 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.