Cold hardiness & minimum temperature

Is Greig's Tulip (Tulipa greigii)cold hardy? Hardiness zone & min temp

Also called Greig's tulip, Greigii tulip.

More about greig's tulip

About Greig's Tulip

Tulipa greigii · also called Greig's tulip, Greigii tulip · flowering

Greig's tulip is a species tulip from Central Asia producing wide, open, bowl-shaped flowers in vivid red, orange, or yellow, often with a contrasting dark basal blotch. Its most distinctive feature is the purple-mottled or streaked foliage. Short-stemmed and reliably perennial, it is excellent for rock gardens, containers, and the front of borders. Toxic to pets.

Cold limit: USDA 3-8 · RHS H6 (-20–22°C (growing season 0–18°C))

What greig's tulip's hardiness rating actually means

Yes — greig's tulip is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 3-8 — 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 −20 to −15 °C. Greig's Tulip is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for greig's tulip as it gets too cold:

It tolerates winter lows to about −20 to −15 °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 greig's tulip go outside or overwinter — and where?

Plant it out within USDA 3-8 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 greig's tulip can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Greig's Tulip hardiness — frequently asked questions

Is greig's tulip cold hardy?

Yes — greig's tulip is genuinely cold hardy. Rated RHS H6 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Greig's Tulip is hardy across USDA 3-8; 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 greig's tulip can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Greig's Tulip is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is greig's tulip?

Greig's Tulip is rated USDA 3-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can greig's tulip survive winter outside?

Plant it out within USDA 3-8 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 greig's tulip below its minimum temperature?

It tolerates winter lows to about −20 to −15 °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.