Cold hardiness & minimum temperature

Is Osteospermum 'Akila Daisy White' (Osteospermum ecklonis 'Akila Daisy White')cold hardy? Hardiness zone & min temp

Also called Akila Daisy White, Upright White African Daisy.

More about osteospermum 'akila daisy white'

About Osteospermum 'Akila Daisy White'

Osteospermum ecklonis 'Akila Daisy White' · also called Akila Daisy White, Upright White African Daisy · flowering

'Akila Daisy White' is an upright, seed-raised Cape daisy with clean white rays around a steely blue-purple eye, valued for uniform, well-branched plants and early, prolific bloom. A sun-loving tender perennial grown as an annual, it excels in containers and bedding, tolerates heat better than older types, and flowers from late spring into autumn with deadheading.

Cold limit: USDA 9-11 (grown as an annual in cooler zones) · RHS H3 (10-26°C)

Watch for — Heat-induced bloom pause: Flowering can slow in peak summer heat. Keep roots cool and evenly moist, and bloom resumes as temperatures ease.

What osteospermum 'akila daisy white''s hardiness rating actually means

Hardiness works differently for osteospermum 'akila daisy white': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". Its RHS rating of H3 means: Half-hardy — comes through mild UK winters outside but is killed by a hard freeze. On the US scale that maps to USDA 9-11 (grown as an annual in cooler zones) — 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

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

Concretely, for osteospermum 'akila daisy white' as it gets too cold:

Light frost (around 0 to −2 °C) damages or kills tender summer crops outright; cold-hardy types take a few degrees of frost.
The plant does not "survive winter" — its life cycle simply ends, by design, when frost arrives or it finishes cropping.
A surprise late spring frost can also kill young transplants set out too early, before the season even starts.

Can osteospermum 'akila daisy white' go outside or overwinter — and where?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost.
In short-season zones, start it indoors or under cover to stretch the effective growing window.
Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

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 osteospermum 'akila daisy white' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H3 figure above.

Frost protection for borderline osteospermum 'akila daisy white'

Osteospermum 'Akila Daisy White' is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks.
Have row cover ready for an unexpected late spring or early autumn frost.
Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.

Osteospermum 'Akila Daisy White' hardiness — frequently asked questions

Is osteospermum 'akila daisy white' cold hardy?

Hardiness works differently for osteospermum 'akila daisy white': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". A seasonal crop, not a perennial. Osteospermum 'Akila Daisy White' is grown 9-11 (grown as an annual in cooler zones); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature osteospermum 'akila daisy white' can survive?

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

What hardiness zone is osteospermum 'akila daisy white'?

Osteospermum 'Akila Daisy White' is rated USDA 9-11 (grown as an annual in cooler zones) and RHS H3 — Half-hardy — comes through mild UK winters outside but is killed by a hard freeze.

Can osteospermum 'akila daisy white' survive winter outside?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost. In short-season zones, start it indoors or under cover to stretch the effective growing window. Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

How do I protect osteospermum 'akila daisy white' from frost?

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks. Have row cover ready for an unexpected late spring or early autumn frost. Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.