Cold hardiness & minimum temperature

Is Syngonium Neon Robusta (Pink Arrowhead) (Syngonium podophyllum 'Neon Robusta')cold hardy? Hardiness zone & min temp

Also called Pink Syngonium, Neon Robusta, Pink Arrowhead Vine, Neon Arrowhead Plant, Goosefoot Plant.

More about syngonium neon robusta (pink arrowhead)

About Syngonium Neon Robusta (Pink Arrowhead)

Syngonium podophyllum 'Neon Robusta' · also called Pink Syngonium, Neon Robusta · houseplant

Syngonium 'Neon Robusta' is a fast-growing tropical aroid prized for soft pink, arrow-shaped leaves. It thrives in bright, indirect light, warm rooms, and moderate humidity, watered when the top inch of soil dries. The ASPCA lists Syngonium podophyllum as toxic to cats and dogs, so keep it out of pets' reach.

Cold limit: USDA USDA 10-12 (RHS H1B); grown as a houseplant in cooler climates (18-29C)

Watch for — Drooping leaves: Often underwatering or cold draughts. Check soil moisture and keep the plant away from cold windows, vents, and temperatures below 15C (60F).

What syngonium neon robusta (pink arrowhead)'s hardiness rating actually means

Syngonium Neon Robusta (Pink Arrowhead) 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA USDA 10-12 (RHS H1B); grown as a houseplant in cooler climates — 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 5 °C (and never frost). Syngonium Neon Robusta (Pink Arrowhead) has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for syngonium neon robusta (pink arrowhead) as it gets too cold:

Below about about 5 °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 syngonium neon robusta (pink arrowhead) go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °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 syngonium neon robusta (pink arrowhead) can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Syngonium Neon Robusta (Pink Arrowhead) hardiness — frequently asked questions

Is syngonium neon robusta (pink arrowhead) cold hardy?

Syngonium Neon Robusta (Pink Arrowhead) 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. Syngonium Neon Robusta (Pink Arrowhead) can only live outside year-round in genuinely frost-free climates (roughly USDA USDA 10-12 (RHS H1B); grown as a houseplant in cooler climates); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature syngonium neon robusta (pink arrowhead) can survive?

What hardiness zone is syngonium neon robusta (pink arrowhead)?

Syngonium Neon Robusta (Pink Arrowhead) is rated USDA USDA 10-12 (RHS H1B); grown as a houseplant in cooler climates and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can syngonium neon robusta (pink arrowhead) survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °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 syngonium neon robusta (pink arrowhead) below its minimum temperature?

Below about about 5 °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.