Cold hardiness & minimum temperature

Is Begonia × semperflorens-cultorum 'Dragon Wing Red' (Begonia × semperflorens-cultorum 'Dragon Wing Red')cold hardy? Hardiness zone & min temp

Also called Dragon Wing Red Begonia, Angel Wing Begonia Red.

More about begonia × semperflorens-cultorum 'dragon wing red'

About Begonia × semperflorens-cultorum 'Dragon Wing Red'

Begonia × semperflorens-cultorum 'Dragon Wing Red' · also called Dragon Wing Red Begonia, Angel Wing Begonia Red · flowering

Dragon Wing Red is a vigorous cane-type hybrid begonia with glossy angel-wing leaves and cascading clusters of scarlet-red flowers that bloom non-stop from spring to frost. It tolerates more heat and sun than wax begonias, thrives in containers and baskets, and shrugs off humidity. Self-cleaning blooms mean little deadheading. Tender perennial grown as an annual.

Cold limit: USDA 10-11 (grown as an annual in most zones) · RHS H1c (15-30°C)

What begonia × semperflorens-cultorum 'dragon wing red''s hardiness rating actually means

Hardiness works differently for begonia × semperflorens-cultorum 'dragon wing red': 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 H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 10-11 (grown as an annual in most 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 begonia × semperflorens-cultorum 'dragon wing red' 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 begonia × semperflorens-cultorum 'dragon wing red' 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 begonia × semperflorens-cultorum 'dragon wing red' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Frost protection for borderline begonia × semperflorens-cultorum 'dragon wing red'

Begonia × semperflorens-cultorum 'Dragon Wing Red' 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.

Begonia × semperflorens-cultorum 'Dragon Wing Red' hardiness — frequently asked questions

Is begonia × semperflorens-cultorum 'dragon wing red' cold hardy?

Hardiness works differently for begonia × semperflorens-cultorum 'dragon wing red': 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. Begonia × semperflorens-cultorum 'Dragon Wing Red' is grown 10-11 (grown as an annual in most zones); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature begonia × semperflorens-cultorum 'dragon wing red' 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 begonia × semperflorens-cultorum 'dragon wing red'?

Begonia × semperflorens-cultorum 'Dragon Wing Red' is rated USDA 10-11 (grown as an annual in most zones) and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can begonia × semperflorens-cultorum 'dragon wing red' 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 begonia × semperflorens-cultorum 'dragon wing red' 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.