Cold hardiness & minimum temperature

Is Parrotia persica (Parrotia persica)cold hardy? Hardiness zone & min temp

Also called Persian Ironwood, Persian Witch Hazel.

More about parrotia persica

About Parrotia persica

Parrotia persica · also called Persian Ironwood, Persian Witch Hazel · flowering

Persian ironwood is a slow-growing deciduous tree prized for exfoliating bark and fiery autumn colour. Tiny red, petal-less flowers open on bare branches in late winter. It thrives in full sun, tolerates a range of soils once established, and is exceptionally hardy and pest-resistant, making a superb specimen for medium-sized gardens.

Cold limit: USDA 4-8 · RHS H6 (-25 to 30°C)

Watch for — Lower branches sweeping to ground: The crown can become congested and skirt the ground. Crown-lift by removing the lowest branches in late winter if clearance is needed.

What parrotia persica's hardiness rating actually means

Yes — parrotia persica 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. Parrotia persica is built for winter — once established it takes hard frost and snow in its stride.

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

Parrotia persica hardiness — frequently asked questions

Is parrotia persica cold hardy?

Yes — parrotia persica 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. Parrotia persica 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 parrotia persica can survive?

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

What hardiness zone is parrotia persica?

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

Can parrotia persica 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 parrotia persica 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.