UK hardiness
Is Impatiens hawkeri 'SunPatiens Spreading White' hardy in the UK?
Impatiens hawkeri 'SunPatiens Spreading White'
More about impatiens hawkeri 'sunpatiens spreading white' in the UK
Impatiens hawkeri 'SunPatiens Spreading White' and the RHS hardiness rating
Impatiens hawkeri 'SunPatiens Spreading White' is rated RHS H2 — tender, meaning it withstands winter minimums of about 1 to 5°C. In practice that means it needs a frost-free greenhouse or indoors over winter — a UK frost will kill it. 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 impatiens hawkeri 'sunpatiens spreading white' USDA hardiness guide.
Does UK region change it?
Because impatiens hawkeri 'sunpatiens spreading white' 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 impatiens hawkeri 'sunpatiens spreading white' in the UK
Overwintering impatiens hawkeri 'sunpatiens spreading white' 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.
Impatiens hawkeri 'SunPatiens Spreading White' UK hardiness — frequently asked questions
Is impatiens hawkeri 'sunpatiens spreading white' hardy in the UK?
Impatiens hawkeri 'SunPatiens Spreading White' is rated RHS H2 (tender, hardy to about 1 to 5°C). It is not winter-hardy anywhere in the UK and must be overwintered under cover.
Can impatiens hawkeri 'sunpatiens spreading white' stay outside over winter in the UK?
No. Impatiens hawkeri 'SunPatiens Spreading White' 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 H2 mean?
RHS hardiness ratings run H1a (needs a heated glasshouse) to H7 (survives below -20°C). Impatiens hawkeri 'SunPatiens Spreading White''s rating, H2, means tender — it tolerates winter minimums of about 1 to 5°C. The rating is an absolute minimum, not an average.
How do I overwinter impatiens hawkeri 'sunpatiens spreading white' in the UK?
Overwintering impatiens hawkeri 'sunpatiens spreading white' 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 impatiens hawkeri 'sunpatiens spreading white' survives?
Because impatiens hawkeri 'sunpatiens spreading white' 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 impatiens hawkeri 'sunpatiens spreading white' care
See the full impatiens hawkeri 'sunpatiens spreading white' care guide, its temperature & humidity needs, and the US (USDA) hardiness version of this page.