Cold hardiness & minimum temperature

Is Cherry of the Río Grande (Eugenia involucrata)cold hardy? Hardiness zone & min temp

Also called Cherry of the Río Grande, Cerejeira, Brazil Cherry.

More about cherry of the río grande

About Cherry of the Río Grande

Eugenia involucrata · also called Cherry of the Río Grande, Cerejeira · tropical

Eugenia involucrata is a Brazilian rainforest-edge tree producing clusters of sweet, dark-red to black cherries prized for fresh eating and jams. It grows as a medium evergreen tree with glossy foliage, tolerating brief mild frosts once established. It performs well in subtropical gardens and large containers in warm temperate zones with frost protection.

Cold limit: USDA 9b-11 · RHS H1b (12–35°C)

Watch for — Scale insects on stems: Brown soft scale and wax scale colonize stems and the undersides of leaves, excreting honeydew that encourages sooty mold. Treat with horticultural oil spray in late winter before new growth emerges and again in early summer.

What cherry of the río grande's hardiness rating actually means

Cherry of the Río Grande 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 9b-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 °C (sustained cold below this is damaging). Cherry of the Río Grande has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Cherry of the Río Grande hardiness — frequently asked questions

Is cherry of the río grande cold hardy?

Cherry of the Río Grande 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. Cherry of the Río Grande can only live outside year-round in genuinely frost-free climates (roughly USDA 9b-11); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature cherry of the río grande can survive?

What hardiness zone is cherry of the río grande?

Cherry of the Río Grande is rated USDA 9b-11 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can cherry of the río grande 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 cherry of the río grande 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.