Cold hardiness & minimum temperature

Is Schefflera (Schefflera arboricola)cold hardy? Hardiness zone & min temp

Also called umbrella tree, dwarf umbrella plant, parasol plant.

About Schefflera

Schefflera arboricola · also called umbrella tree, dwarf umbrella plant · tropical

Schefflera is an umbrella-leaved tropical tree from Taiwan, fast-growing and light-hungry. The dwarf species (S. arboricola) is the common houseplant form; the giant S. actinophylla is rarely grown indoors. Toxic to pets.

Schefflera arboricola (Heptapleurum arboricola), the dwarf umbrella tree, is an evergreen shrub native to Taiwan and Hainan Province, China, where it grows free-standing or clings to other tree trunks as an epiphyte.

It can grow into a tall, fast, multi-stemmed shrub and tolerates hard pruning to stay bushy. All parts contain calcium oxalate crystals, saponins and terpenoids and the plant is toxic to cats and dogs (oral burning, swelling, vomiting) per the ASPCA.

Cold limit: USDA 10-12 (indoor-only) · RHS H1b (18-26°C)

Watch for — Yellow leaves: Overwatering or sudden cold.

Sources: en.wikipedia.org, aspca.org, plantcaretoday.com

What schefflera's hardiness rating actually means

Schefflera 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 (indoor-only) — 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). Schefflera has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Schefflera hardiness — frequently asked questions

Is schefflera cold hardy?

Schefflera 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. Schefflera can only live outside year-round in genuinely frost-free climates (roughly USDA 10-12 (indoor-only)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature schefflera can survive?

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Schefflera has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is schefflera?

Schefflera is rated USDA 10-12 (indoor-only) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can schefflera 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 schefflera 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.