UK hardiness
Is Velvet Cotyledon hardy in the UK?
Cotyledon velutina
More about velvet cotyledon in the UK
Velvet Cotyledon and the RHS hardiness rating
Velvet Cotyledon is rated RHS H1c — warm temperate, meaning it withstands winter minimums of about 5 to 10°C. In practice that means it fine outdoors through most UK summers but must come in before the first frost. 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 velvet cotyledon USDA hardiness guide.
Does UK region change it?
Because velvet cotyledon 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 velvet cotyledon in the UK
Overwintering velvet cotyledon 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.
Velvet Cotyledon UK hardiness — frequently asked questions
Is velvet cotyledon hardy in the UK?
Velvet Cotyledon is rated RHS H1c (warm temperate, hardy to about 5 to 10°C). It is not winter-hardy anywhere in the UK and must be overwintered under cover.
Can velvet cotyledon stay outside over winter in the UK?
No. Velvet Cotyledon 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 H1c mean?
RHS hardiness ratings run H1a (needs a heated glasshouse) to H7 (survives below -20°C). Velvet Cotyledon's rating, H1c, means warm temperate — it tolerates winter minimums of about 5 to 10°C. The rating is an absolute minimum, not an average.
How do I overwinter velvet cotyledon in the UK?
Overwintering velvet cotyledon 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 velvet cotyledon survives?
Because velvet cotyledon 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 velvet cotyledon care
See the full velvet cotyledon care guide, its temperature & humidity needs, and the US (USDA) hardiness version of this page.