Cold hardiness & minimum temperature

Is Chilean Butterwort (Pinguicula chilensis)cold hardy? Hardiness zone & min temp

Also called Chile Butterwort, Temperate Butterwort.

More about chilean butterwort

About Chilean Butterwort

Pinguicula chilensis · also called Chile Butterwort, Temperate Butterwort · tropical

Pinguicula chilensis is a temperate carnivorous butterwort from Chile and Argentina, forming flat rosettes of glistening sticky leaves that trap small insects and fungus gnats. It tolerates cool temperatures and brief frost. Care requirements are minimal. Not listed as toxic by the ASPCA; considered safe around pets.

Cold limit: USDA 8-11 · RHS H4 (0-25°C)

Watch for — Loss of stickiness on leaves: Usually caused by too little light or the plant entering its non-carnivorous winter rosette phase, which is normal. Increase light in the growing season.

What chilean butterwort's hardiness rating actually means

Yes — chilean butterwort is genuinely cold hardy. Rated RHS H4 and USDA 8-11, 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 8-11 — 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. Chilean Butterwort is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for chilean butterwort 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 chilean butterwort go outside or overwinter — and where?

Plant it out within USDA 8-11 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 chilean butterwort can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Chilean Butterwort hardiness — frequently asked questions

Is chilean butterwort cold hardy?

Yes — chilean butterwort is genuinely cold hardy. Rated RHS H4 and USDA 8-11, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Chilean Butterwort is hardy across USDA 8-11; 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 chilean butterwort can survive?

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

What hardiness zone is chilean butterwort?

Chilean Butterwort is rated USDA 8-11 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can chilean butterwort survive winter outside?

Plant it out within USDA 8-11 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 chilean butterwort 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.