Cold hardiness & minimum temperature

Is Queeny Lime Orange zinnia (Zinnia elegans 'Queeny Lime Orange')cold hardy? Hardiness zone & min temp

Also called Queeny Lime Orange zinnia, Queeny Lime Orange.

More about queeny lime orange zinnia

About Queeny Lime Orange zinnia

Zinnia elegans 'Queeny Lime Orange' · also called Queeny Lime Orange zinnia, Queeny Lime Orange · flowering

A striking annual zinnia bearing large, double blooms that open lime-green before maturing to warm orange with bicolor petals. Thrives in full sun with well-drained soil and tolerates summer heat well. Excellent for cutting gardens and pollinator borders. Deadhead regularly to extend the prolific bloom season from early summer through frost.

Cold limit: USDA 2–11 (grown as annual) · RHS H1c (frost-tender annual) (18–35°C)

What queeny lime orange zinnia's hardiness rating actually means

Queeny Lime Orange zinnia 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 2–11 (grown as annual) — 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). Queeny Lime Orange zinnia has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Queeny Lime Orange zinnia hardiness — frequently asked questions

Is queeny lime orange zinnia cold hardy?

Queeny Lime Orange zinnia 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. Queeny Lime Orange zinnia can only live outside year-round in genuinely frost-free climates (roughly USDA 2–11 (grown as annual)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature queeny lime orange zinnia can survive?

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

What hardiness zone is queeny lime orange zinnia?

Queeny Lime Orange zinnia is rated USDA 2–11 (grown as annual) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can queeny lime orange zinnia 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 queeny lime orange zinnia 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.