Cold hardiness & minimum temperature

Is Heart-leaved Pinellia (Pinellia cordata)cold hardy? Hardiness zone & min temp

Also called Heart-leaved Pinellia, Cordate Pinellia.

More about heart-leaved pinellia

About Heart-leaved Pinellia

Pinellia cordata · also called Heart-leaved Pinellia, Cordate Pinellia · herb

Pinellia cordata is a compact East Asian tuberous herb grown for its distinctive heart-shaped leaves and curious aroid spathes. It thrives in dappled shade with consistent moisture and well-draining humus-rich soil. Though used in traditional Chinese medicine (ban xia), the raw corm contains sharp calcium oxalate crystals and is toxic to pets and humans if ingested unprocessed.

Cold limit: USDA 7–10 · RHS H4 (10–25°C)

Watch for — Failure to re-emerge after dormancy: If the corm is kept too cold and wet over winter it may rot. Store dormant corms in barely moist, frost-free conditions (above 5°C/41°F). Check for firmness before replanting in spring.

What heart-leaved pinellia's hardiness rating actually means

Yes — heart-leaved pinellia is genuinely cold hardy. Rated RHS H4 and USDA 7–10, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 7–10 — 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 −10 to −5 °C. Heart-leaved Pinellia is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for heart-leaved pinellia as it gets too cold:

It tolerates winter lows to about −10 to −5 °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 heart-leaved pinellia go outside or overwinter — and where?

Plant it out within USDA 7–10 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 heart-leaved pinellia can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Heart-leaved Pinellia hardiness — frequently asked questions

Is heart-leaved pinellia cold hardy?

Yes — heart-leaved pinellia is genuinely cold hardy. Rated RHS H4 and USDA 7–10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Heart-leaved Pinellia is hardy across USDA 7–10; 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 heart-leaved pinellia can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Heart-leaved Pinellia is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is heart-leaved pinellia?

Heart-leaved Pinellia is rated USDA 7–10 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can heart-leaved pinellia survive winter outside?

Plant it out within USDA 7–10 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 heart-leaved pinellia below its minimum temperature?

It tolerates winter lows to about −10 to −5 °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.