Cold hardiness & minimum temperature

Is Crippsii Hinoki Cypress (Chamaecyparis obtusa 'Crippsii')cold hardy? Hardiness zone & min temp

Also called Cripps Golden Hinoki Cypress, Golden Hinoki Cypress.

More about crippsii hinoki cypress

About Crippsii Hinoki Cypress

Chamaecyparis obtusa 'Crippsii' · also called Cripps Golden Hinoki Cypress, Golden Hinoki Cypress · flowering

One of the finest golden Hinoki cypresses, 'Crippsii' forms a loose, broadly conical specimen with arching sprays of bright golden-yellow new growth fading to greenish-gold within. Moderate in vigour, it makes a glowing focal point. Full sun maximises the gold; it needs moist, well-drained, slightly acidic soil and cool, humid conditions to look its best.

Cold limit: USDA 4-8 (hardy golden conifer) · RHS H6 (-25 to 28°C)

What crippsii hinoki cypress's hardiness rating actually means

Yes — crippsii hinoki cypress is genuinely cold hardy. Rated RHS H6 and USDA 4-8 (hardy golden conifer), 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 4-8 (hardy golden conifer) — 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. Crippsii Hinoki Cypress is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for crippsii hinoki cypress 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 crippsii hinoki cypress go outside or overwinter — and where?

Plant it out within USDA 4-8 (hardy golden conifer) 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 crippsii hinoki cypress can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Crippsii Hinoki Cypress hardiness — frequently asked questions

Is crippsii hinoki cypress cold hardy?

Yes — crippsii hinoki cypress is genuinely cold hardy. Rated RHS H6 and USDA 4-8 (hardy golden conifer), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Crippsii Hinoki Cypress is hardy across USDA 4-8 (hardy golden conifer); 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 crippsii hinoki cypress can survive?

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

What hardiness zone is crippsii hinoki cypress?

Crippsii Hinoki Cypress is rated USDA 4-8 (hardy golden conifer) and RHS H6 — Hardy throughout the UK and northern Europe.

Can crippsii hinoki cypress survive winter outside?

Plant it out within USDA 4-8 (hardy golden conifer) 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 crippsii hinoki cypress 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.