Cold hardiness & minimum temperature

Is Red Arrow Arrowhead Vine (Syngonium erythrophyllum)cold hardy? Hardiness zone & min temp

Also called red arrow arrowhead vine, red Syngonium, burgundy arrowhead plant.

More about red arrow arrowhead vine

About Red Arrow Arrowhead Vine

Syngonium erythrophyllum · also called red arrow arrowhead vine, red Syngonium · houseplant

Syngonium erythrophyllum is a rare Panamanian aroid prized for its velvety, deep burgundy-red to dark green arrow-shaped leaves with a contrasting copper-red underside. Relatively compact and slow-growing, it suits bright-to-medium indirect light and high humidity. All Syngonium are toxic — calcium oxalate crystals cause oral irritation in pets.

Cold limit: USDA 11-12 · RHS H1b (18–28°C)

Watch for — Slow growth / stalling: S. erythrophyllum is naturally slow; stalling often indicates root-bound conditions, low temperatures below 18°C, or low humidity. Repot in spring if roots are circling the base and ensure warmth and humidity are adequate.

What red arrow arrowhead vine's hardiness rating actually means

Red Arrow Arrowhead Vine 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 11-12 — 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). Red Arrow Arrowhead Vine has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for red arrow arrowhead vine 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 red arrow arrowhead vine 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 red arrow arrowhead vine can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Red Arrow Arrowhead Vine hardiness — frequently asked questions

Is red arrow arrowhead vine cold hardy?

Red Arrow Arrowhead Vine 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. Red Arrow Arrowhead Vine can only live outside year-round in genuinely frost-free climates (roughly USDA 11-12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature red arrow arrowhead vine can survive?

What hardiness zone is red arrow arrowhead vine?

Red Arrow Arrowhead Vine is rated USDA 11-12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can red arrow arrowhead vine 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 red arrow arrowhead vine 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.