Cold hardiness & minimum temperature

Is Tulipa 'Tulipa clusiana' (Tulipa clusiana)cold hardy? Hardiness zone & min temp

Also called lady tulip, peppermint stick tulip, species tulip.

More about tulipa 'tulipa clusiana'

About Tulipa 'Tulipa clusiana'

Tulipa clusiana · also called lady tulip, peppermint stick tulip · flowering

Tulipa clusiana, the lady or peppermint-stick tulip, is a dainty species tulip with slender star-shaped blooms that are white to pale yellow inside and striped rose-red on the outside. Unlike hybrid tulips, this Mediterranean-to-Himalayan species naturalises well in sunny, sharply drained spots and reliably returns year after year, opening wide in sun and closing at night.

Cold limit: USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer) · RHS H5 (-15 to 24°C)

What tulipa 'tulipa clusiana''s hardiness rating actually means

Yes — tulipa 'tulipa clusiana' is genuinely cold hardy. Rated RHS H5 and USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer), 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 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer) — 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. Tulipa 'Tulipa clusiana' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for tulipa 'tulipa clusiana' 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 tulipa 'tulipa clusiana' go outside or overwinter — and where?

Plant it out within USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer) 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 tulipa 'tulipa clusiana' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Tulipa 'Tulipa clusiana' hardiness — frequently asked questions

Is tulipa 'tulipa clusiana' cold hardy?

Yes — tulipa 'tulipa clusiana' is genuinely cold hardy. Rated RHS H5 and USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Tulipa 'Tulipa clusiana' is hardy across USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer); 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 tulipa 'tulipa clusiana' can survive?

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

What hardiness zone is tulipa 'tulipa clusiana'?

Tulipa 'Tulipa clusiana' is rated USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer) and RHS H5 — Hardy in most of the UK and in cold winters.

Can tulipa 'tulipa clusiana' survive winter outside?

Plant it out within USDA 3-8 (needs winter chill; one of the better tulips for warmer zones with a dry summer) 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 tulipa 'tulipa clusiana' 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.