Cold hardiness & minimum temperature

Is Tender and True Parsnip (Pastinaca sativa)cold hardy? Hardiness zone & min temp

Also called Parsnip, Hollow Crown Parsnip.

More about tender and true parsnip

About Tender and True Parsnip

Pastinaca sativa · also called Parsnip, Hollow Crown Parsnip · edible

Tender and True is a time-tested British heirloom parsnip variety prized for its long, smooth, canker-resistant roots with a sweet, nutty flavour that intensifies after frost. One of the finest exhibition and kitchen varieties. Not ASPCA-listed; parsnip sap is phototoxic to skin but poses minimal internal risk to pets.

Cold limit: USDA 3-10 (cool-season biennial grown as annual) · RHS H6 (6-18°C)

What tender and true parsnip's hardiness rating actually means

Yes — tender and true parsnip is genuinely cold hardy. Rated RHS H6 and USDA 3-10 (cool-season biennial grown as annual), 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 3-10 (cool-season biennial grown as annual) — 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. Tender and True Parsnip is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for tender and true parsnip 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 tender and true parsnip go outside or overwinter — and where?

Plant it out within USDA 3-10 (cool-season biennial grown as annual) 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 tender and true parsnip can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Tender and True Parsnip hardiness — frequently asked questions

Is tender and true parsnip cold hardy?

Yes — tender and true parsnip is genuinely cold hardy. Rated RHS H6 and USDA 3-10 (cool-season biennial grown as annual), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Tender and True Parsnip is hardy across USDA 3-10 (cool-season biennial grown as annual); 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 tender and true parsnip can survive?

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

What hardiness zone is tender and true parsnip?

Tender and True Parsnip is rated USDA 3-10 (cool-season biennial grown as annual) and RHS H6 — Hardy throughout the UK and northern Europe.

Can tender and true parsnip survive winter outside?

Plant it out within USDA 3-10 (cool-season biennial grown as annual) 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 tender and true parsnip 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.