Cold hardiness & minimum temperature

Is Boivin's Aponogeton (Aponogeton boivinianus)cold hardy? Hardiness zone & min temp

Also called Boivin's Aponogeton, Crinkled Aponogeton.

More about boivin's aponogeton

About Boivin's Aponogeton

Aponogeton boivinianus · also called Boivin's Aponogeton, Crinkled Aponogeton · houseplant

A large and robust Madagascar Aponogeton with dramatically crinkled, dark green, semi-transparent leaves that can reach 80 cm in exceptional conditions. Better suited to experienced aquarists due to its size requirements and need for clean, cool water. It is a heavy root feeder and fast grower that makes a bold statement in the background of large planted aquariums.

Cold limit: USDA 10-12 · RHS H1b (22–26°C)

What boivin's aponogeton's hardiness rating actually means

Boivin's Aponogeton is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Its RHS rating of H1b means: Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season. On the US scale that maps to USDA 10-12 — 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 °C (sustained cold below this is damaging). Boivin's Aponogeton has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for boivin's aponogeton as it gets too cold:

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches.
A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover.
Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.

Can boivin's aponogeton go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually.
Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C.
It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

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 boivin's aponogeton can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Boivin's Aponogeton hardiness — frequently asked questions

Is boivin's aponogeton cold hardy?

Boivin's Aponogeton is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Indoor-only in almost every home. Boivin's Aponogeton can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature boivin's aponogeton can survive?

What hardiness zone is boivin's aponogeton?

Boivin's Aponogeton is rated USDA 10-12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can boivin's aponogeton survive winter outside?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually. Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C. It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

What happens to boivin's aponogeton below its minimum temperature?

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches. A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover. Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.