Cold hardiness & minimum temperature

Is Baker's Tulip (Tulipa bakeri)cold hardy? Hardiness zone & min temp

Also called Baker's tulip, Candia tulip, Cretan tulip.

More about baker's tulip

About Baker's Tulip

Tulipa bakeri · also called Baker's tulip, Candia tulip · flowering

Tulipa bakeri (also treated as Tulipa saxatilis Bakeri Group) is a species tulip native to Crete, bearing lightly fragrant, mauve-pink flowers with a conspicuous bright yellow centre in mid-spring. It is one of the most reliably perennial tulips for UK and US gardens, spreading by stolons to form naturalising colonies in well-drained, sunny spots. The key care fact is that it sets stolons freely and benefits from a dry summer baking to flower well the following year. All Tulipa are toxic to cats, dogs, and horses.

Cold limit: USDA 4-8 · RHS H5 (-15°C to 25°C)

Watch for — Poor flowering in subsequent years: Baker's tulip fails to re-flower reliably when summers are cold and wet, as bulbs do not receive sufficient heat to initiate buds. Grow at the base of a warm wall or lift bulbs and store dry to ensure summer baking.

What baker's tulip's hardiness rating actually means

Yes — baker's tulip is genuinely cold hardy. Rated RHS H5 and USDA 4-8, 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 4-8 — 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 −15 to −10 °C. Baker's Tulip is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for baker's tulip 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 baker's tulip go outside or overwinter — and where?

Plant it out within USDA 4-8 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 baker's tulip can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Baker's Tulip hardiness — frequently asked questions

Is baker's tulip cold hardy?

Yes — baker's tulip is genuinely cold hardy. Rated RHS H5 and USDA 4-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Baker's Tulip is hardy across USDA 4-8; 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 baker's tulip can survive?

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

What hardiness zone is baker's tulip?

Baker's Tulip is rated USDA 4-8 and RHS H5 — Hardy in most of the UK and in cold winters.

Can baker's tulip survive winter outside?

Plant it out within USDA 4-8 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 baker's tulip 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.