Cold hardiness & minimum temperature

Is Hedera colchica (Hedera colchica)cold hardy? Hardiness zone & min temp

Also called Persian ivy, Colchis ivy, elephant's ears ivy.

More about hedera colchica

About Hedera colchica

Hedera colchica · also called Persian ivy, Colchis ivy · flowering

Hedera colchica, Persian ivy, bears the largest leaves of any ivy, big leathery heart-shaped blades to 25 cm, earning the name 'elephant's ears'. Native to the Caucasus and northern Iran, it is a robust, shade-tolerant evergreen climber. Mature growth produces clusters of small greenish flowers followed by black berries, mainly outdoors.

Cold limit: USDA 6-9 (outdoors) · RHS H5 (10-21°C)

What hedera colchica's hardiness rating actually means

Yes — hedera colchica is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (outdoors), 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 6-9 (outdoors) — 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. Hedera colchica is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for hedera colchica 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 hedera colchica go outside or overwinter — and where?

Plant it out within USDA 6-9 (outdoors) 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 hedera colchica can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Hedera colchica hardiness — frequently asked questions

Is hedera colchica cold hardy?

Yes — hedera colchica is genuinely cold hardy. Rated RHS H5 and USDA 6-9 (outdoors), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Hedera colchica is hardy across USDA 6-9 (outdoors); 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 hedera colchica can survive?

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

What hardiness zone is hedera colchica?

Hedera colchica is rated USDA 6-9 (outdoors) and RHS H5 — Hardy in most of the UK and in cold winters.

Can hedera colchica survive winter outside?

Plant it out within USDA 6-9 (outdoors) 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 hedera colchica 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.