Cold hardiness & minimum temperature

Is Pacific Yew (Taxus brevifolia)cold hardy? Hardiness zone & min temp

Also called Pacific Yew, Western Yew.

More about pacific yew

About Pacific Yew

Taxus brevifolia · also called Pacific Yew, Western Yew · flowering

Pacific Yew is a slow-growing evergreen tree or large shrub native to the shaded understorey of Pacific Coast forests from Alaska to California. Famous as the original source of paclitaxel (Taxol), a frontline cancer chemotherapy drug first isolated from its bark. It features spirally arranged, flat dark-green needles, bright red arils, and reddish-purple flaking bark. All parts except the aril flesh are severely toxic.

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

Watch for — Scale insects (Parthenolecanium spp.): Soft scales can encrust stems and cause needle yellowing and sooty mould from honeydew deposits. Apply horticultural oil in late winter to kill overwintering crawlers; use systemic insecticide for heavy infestations. Ensure good air circulation.

What pacific yew's hardiness rating actually means

Yes — pacific yew is genuinely cold hardy. Rated RHS H6 and USDA 4-8, 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 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 −20 to −15 °C. Pacific Yew is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for pacific yew 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 pacific yew 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 pacific yew can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Pacific Yew hardiness — frequently asked questions

Is pacific yew cold hardy?

Yes — pacific yew is genuinely cold hardy. Rated RHS H6 and USDA 4-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Pacific Yew 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 pacific yew can survive?

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

What hardiness zone is pacific yew?

Pacific Yew is rated USDA 4-8 and RHS H6 — Hardy throughout the UK and northern Europe.

Can pacific yew 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 pacific yew 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.