Cold hardiness & minimum temperature

Is Wine Cups Babiana (Babiana rubrocyanea)cold hardy? Hardiness zone & min temp

Also called Wine cups babiana, Wine cup baboon flower, Rooibloubobbejaantjie.

More about wine cups babiana

About Wine Cups Babiana

Babiana rubrocyanea · also called Wine cups babiana, Wine cup baboon flower · flowering

Babiana rubrocyanea is a cormous perennial native to the Western Cape of South Africa, producing vivid wine-red and blue funnel-shaped flowers on short spikes in spring. It thrives in full sun with sharply drained, sandy soil and demands a warm, dry summer dormancy — in most of the UK it must be grown under glass or lifted and stored after flowering. The single most important care fact is to keep corms bone dry once the leaves die down, as summer moisture causes rot. Babiana is not confirmed safe for pets; treat as mildly toxic and keep away from cats and dogs.

Cold limit: USDA 9-10 · RHS H2 (5–25°C (growing); store dry above 5°C in dormancy)

What wine cups babiana's hardiness rating actually means

Wine Cups Babiana is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Its RHS rating of H2 means: Tender — survives a frost-free greenhouse or a very mild, sheltered spot. On the US scale that maps to USDA 9-10 — 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 1 to 5 °C — tolerates cold but no real frost. Wine Cups Babiana shrugs off cold nights but a real, sustained freeze will kill it.

Concretely, for wine cups babiana as it gets too cold:

Down to roughly about 1 to 5 °C it copes, especially if dry and sheltered.
A sustained hard frost collapses the top growth; whether it returns depends on whether the roots, crown or tubers froze.
Wet cold is far more lethal than dry cold for this plant — soggy, frozen soil is the usual killer.

Can wine cups babiana go outside or overwinter — and where?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-10 or a frost-free UK microclimate.
In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter.
A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

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 wine cups babiana can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H2 figure above.

Frost protection for borderline wine cups babiana

Wine Cups Babiana is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost.
Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse.
Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones.
Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.

Wine Cups Babiana hardiness — frequently asked questions

Is wine cups babiana cold hardy?

Wine Cups Babiana is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Borderline outdoors. In its mild end of USDA 9-10 (and sheltered UK gardens) wine cups babiana can stay out; in colder areas it must be lifted, brought in, or treated as a frost-tender plant.

What is the minimum temperature wine cups babiana can survive?

Minimum survivable temperature is roughly about 1 to 5 °C — tolerates cold but no real frost. Wine Cups Babiana shrugs off cold nights but a real, sustained freeze will kill it.

What hardiness zone is wine cups babiana?

Wine Cups Babiana is rated USDA 9-10 and RHS H2 — Tender — survives a frost-free greenhouse or a very mild, sheltered spot.

Can wine cups babiana survive winter outside?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-10 or a frost-free UK microclimate. In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter. A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

How do I protect wine cups babiana from frost?

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost. Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse. Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones. Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.