UK hardiness
Is Hernando Begonia hardy in the UK?
Begonia hernandioides
More about hernando begonia in the UK
Hernando Begonia and the RHS hardiness rating
Hernando Begonia is rated RHS H1a — heated glasshouse — tropical, meaning it withstands winter minimums of about above 15°C. In practice that means it cannot live outdoors in the UK at any time; a warm indoor room or heated glasshouse only. The RHS rating describes an absolute minimum temperature, not an average: a single hard frost below its band is what does the damage, so the question is always "what is the coldest night my garden gets?", not "what is a typical winter here?".
This follows the RHS plant hardiness rating system (H1a–H7), the UK standard. For the US growing-zone view, see the hernando begonia USDA hardiness guide.
Does UK region change it?
Because hernando begonia is frost-tender, UK region matters less than the simple rule: it does not stay outdoors over winter anywhere in the UK. Treat any time outside as a summer holiday — bring it back indoors once nights drop toward 10°C, well before the first frost, and acclimatise it over a week each way so the leaves do not shock.
Overwintering hernando begonia in the UK
Overwintering hernando begonia in the UK means bringing it in: a bright, frost-free room or a heated glasshouse, watered sparingly while growth slows. Do not leave it against cold glass or near an unheated porch. Move it back out only after the last spring frost has passed for your area.
Hernando Begonia UK hardiness — frequently asked questions
Is hernando begonia hardy in the UK?
Hernando Begonia is rated RHS H1a (heated glasshouse — tropical, hardy to about above 15°C). It is not winter-hardy anywhere in the UK and must be overwintered under cover.
Can hernando begonia stay outside over winter in the UK?
No. Hernando Begonia is frost-tender — a UK frost will kill it. Bring it indoors or into a frost-free greenhouse before the first autumn frost and return it outside only after the last spring frost.
What does RHS H1a mean?
RHS hardiness ratings run H1a (needs a heated glasshouse) to H7 (survives below -20°C). Hernando Begonia's rating, H1a, means heated glasshouse — tropical — it tolerates winter minimums of about above 15°C. The rating is an absolute minimum, not an average.
How do I overwinter hernando begonia in the UK?
Overwintering hernando begonia in the UK means bringing it in: a bright, frost-free room or a heated glasshouse, watered sparingly while growth slows. Do not leave it against cold glass or near an unheated porch. Move it back out only after the last spring frost has passed for your area.
Does UK region change whether hernando begonia survives?
Because hernando begonia is frost-tender, UK region matters less than the simple rule: it does not stay outdoors over winter anywhere in the UK. Treat any time outside as a summer holiday — bring it back indoors once nights drop toward 10°C, well before the first frost, and acclimatise it over a week each way so the leaves do not shock.
More hernando begonia care
See the full hernando begonia care guide, its temperature & humidity needs, and the US (USDA) hardiness version of this page.