Cold hardiness & minimum temperature

Is Spotted Nomocharis (Nomocharis pardanthina)cold hardy? Hardiness zone & min temp

Also called Spotted nomocharis, Nomocharis.

More about spotted nomocharis

About Spotted Nomocharis

Nomocharis pardanthina · also called Spotted nomocharis, Nomocharis · flowering

Nomocharis pardanthina is a rare and exquisitely beautiful bulbous perennial in the lily family, native to alpine meadows and forest margins at high altitude in south-west China (Yunnan), Myanmar, and Tibet. It produces nodding, saucer-shaped flowers of pale pink to rose, heavily spotted with deep crimson-purple at the centre, on slender leafy stems in early summer. It demands cool, moist, acidic conditions with excellent drainage and is best suited to a cool, partly shaded peat-bed, woodland garden, or alpine house in the UK; summer heat and dry roots are its greatest enemies. All true lilies (Liliaceae) are extremely toxic to cats.

Cold limit: USDA 6-9 · RHS H5 (-15 to 18°C)

What spotted nomocharis's hardiness rating actually means

Yes — spotted nomocharis is genuinely cold hardy. Rated RHS H5 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 6-9 — 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 −15 to −10 °C. Spotted Nomocharis is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for spotted nomocharis as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 spotted nomocharis go outside or overwinter — and where?

Plant it out within USDA 6-9 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 spotted nomocharis can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Spotted Nomocharis hardiness — frequently asked questions

Is spotted nomocharis cold hardy?

Yes — spotted nomocharis is genuinely cold hardy. Rated RHS H5 and USDA 6-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Spotted Nomocharis is hardy across USDA 6-9; 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 spotted nomocharis can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Spotted Nomocharis is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is spotted nomocharis?

Spotted Nomocharis is rated USDA 6-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can spotted nomocharis survive winter outside?

Plant it out within USDA 6-9 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 spotted nomocharis below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.