Cold hardiness & minimum temperature

Is Echinodorus 'Ozelot' (Echinodorus 'Ozelot')cold hardy? Hardiness zone & min temp

Also called Ozelot sword, spotted Amazon sword.

More about echinodorus 'ozelot'

About Echinodorus 'Ozelot'

Echinodorus 'Ozelot' · also called Ozelot sword, spotted Amazon sword · tropical

A popular hybrid sword prized for broad leaves marbled with dark reddish-brown spots over green to bronze. Hardy and undemanding like other Echinodorus, it makes a striking large rosette as a tank centrepiece. Higher light intensifies the spotting and reddish tones; it feeds heavily through its roots and breeds true from plantlets.

Cold limit: USDA Tropical aquarium plant — not frost hardy; keep indoors above 18°C (22-28°C)

What echinodorus 'ozelot''s hardiness rating actually means

Echinodorus 'Ozelot' 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 Tropical aquarium plant — not frost hardy; keep indoors above 18°C — 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). Echinodorus 'Ozelot' has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Echinodorus 'Ozelot' hardiness — frequently asked questions

Is echinodorus 'ozelot' cold hardy?

Echinodorus 'Ozelot' 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. Echinodorus 'Ozelot' can only live outside year-round in genuinely frost-free climates (roughly USDA Tropical aquarium plant — not frost hardy; keep indoors above 18°C); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature echinodorus 'ozelot' can survive?

What hardiness zone is echinodorus 'ozelot'?

Echinodorus 'Ozelot' is rated USDA Tropical aquarium plant — not frost hardy; keep indoors above 18°C and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can echinodorus 'ozelot' 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 echinodorus 'ozelot' 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.