Cold hardiness & minimum temperature

Is Tradescantia blossfeldiana (Tradescantia blossfeldiana)cold hardy? Hardiness zone & min temp

Also called Flowering Inch Plant, Blushing Bride Spiderwort.

More about tradescantia blossfeldiana

About Tradescantia blossfeldiana

Tradescantia blossfeldiana · also called Flowering Inch Plant, Blushing Bride Spiderwort · houseplant

Tradescantia blossfeldiana is a robust trailing spiderwort with fleshy, dark green leaves that are purple and softly hairy beneath. More substantial than the typical inch plant, it produces clusters of pink-and-white three-petalled flowers and thrives in bright indirect light, even moisture and warmth, rooting effortlessly from cuttings.

Cold limit: USDA 9-11 (grown as a houseplant in most US homes) · RHS H1c (16-24°C)

Watch for — Soft, rotting stem bases: Overwatering or cold, wet compost. Let the surface dry between waterings, improve drainage and remove any mushy stems promptly.

What tradescantia blossfeldiana's hardiness rating actually means

Tradescantia blossfeldiana 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 9-11 (grown as a houseplant in most US homes) — 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). Tradescantia blossfeldiana has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

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

Tradescantia blossfeldiana hardiness — frequently asked questions

Is tradescantia blossfeldiana cold hardy?

Tradescantia blossfeldiana 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. Tradescantia blossfeldiana can only live outside year-round in genuinely frost-free climates (roughly USDA 9-11 (grown as a houseplant in most US homes)); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature tradescantia blossfeldiana can survive?

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

What hardiness zone is tradescantia blossfeldiana?

Tradescantia blossfeldiana is rated USDA 9-11 (grown as a houseplant in most US homes) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can tradescantia blossfeldiana 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 tradescantia blossfeldiana 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.