Cold hardiness & minimum temperature

Is Grumichama (Eugenia brasiliensis)cold hardy? Hardiness zone & min temp

Also called Grumichama, Brazil cherry, Spanish cherry.

More about grumichama

About Grumichama

Eugenia brasiliensis · also called Grumichama, Brazil cherry · tropical

Grumichama is a slow-growing Brazilian evergreen tree in the myrtle family, bearing dark cherry-like fruit with sweet, mild, cherry-flavoured pulp. Compact and ornamental, with glossy leathery leaves, flushes of bronze new growth and fragrant white flowers, it crops quickly after flowering and adapts well to large containers in cooler climates.

Cold limit: USDA 9b-11 (tolerates brief light frost when mature; protect young trees) · RHS H1c (18-30°C)

Watch for — Cold damage: As a tender subtropical it is harmed by frost and chilled near freezing. Grow in movable containers or provide frost protection in marginal climates.

What grumichama's hardiness rating actually means

Grumichama 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 9b-11 (tolerates brief light frost when mature; protect young trees) — 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). Grumichama has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for grumichama 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 grumichama 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 grumichama can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Grumichama hardiness — frequently asked questions

Is grumichama cold hardy?

Grumichama 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. Grumichama can only live outside year-round in genuinely frost-free climates (roughly USDA 9b-11 (tolerates brief light frost when mature; protect young trees)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature grumichama can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). Grumichama has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is grumichama?

Grumichama is rated USDA 9b-11 (tolerates brief light frost when mature; protect young trees) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can grumichama 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 grumichama 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.