UK hardiness
Is Chinese Cabbage 'Michihili' hardy in the UK?
Brassica rapa var. pekinensis 'Michihili'
More about chinese cabbage 'michihili' in the UK
Chinese Cabbage 'Michihili' and the RHS hardiness rating
Chinese Cabbage 'Michihili' is rated RHS H3 (half-hardy; stands light frost but not hard freezes) — half-hardy, meaning it withstands winter minimums of about -5 to 1°C. In practice that means it survives outdoors only in mild or coastal areas, ideally with winter protection (fleece, a sheltered wall). 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 chinese cabbage 'michihili' USDA hardiness guide.
Does UK region change it?
UK winters vary far more by locality than by latitude. Mild western and coastal areas (the south-west, Pembrokeshire, western Scotland's coast) and urban heat islands run several degrees warmer than inland frost pockets, valleys, and exposed eastern sites at the same latitude. A plant marginal on its RHS rating often survives in a sheltered town garden but fails 20 miles inland — so judge by your own coldest recorded night and microclimate (a south-facing wall, a courtyard) rather than the regional average.
Overwintering chinese cabbage 'michihili' in the UK
For a borderline-hardy plant, the UK winter killers are not just cold air but cold wet roots and wind. Improve drainage before winter, mulch the root zone, move containers to a sheltered spot or against a warm wall, and use horticultural fleece on hard-frost nights. Established plants in free-draining soil take far more cold than a recently planted one in heavy, wet ground.
Chinese Cabbage 'Michihili' UK hardiness — frequently asked questions
Is chinese cabbage 'michihili' hardy in the UK?
Chinese Cabbage 'Michihili' is rated RHS H3 (half-hardy; stands light frost but not hard freezes) (half-hardy, hardy to about -5 to 1°C). It survives outdoors only in mild or coastal areas, ideally with winter protection (fleece, a sheltered wall).
Can chinese cabbage 'michihili' stay outside over winter in the UK?
In most of the UK, yes, if your garden's coldest night stays within its RHS H3 (half-hardy; stands light frost but not hard freezes) band (around -5 to 1°C). In colder inland or northern gardens, give it a sheltered spot, sharp drainage, and fleece on hard-frost nights.
What does RHS H3 (half-hardy; stands light frost but not hard freezes) mean?
RHS hardiness ratings run H1a (needs a heated glasshouse) to H7 (survives below -20°C). Chinese Cabbage 'Michihili''s rating, H3 (half-hardy; stands light frost but not hard freezes), means half-hardy — it tolerates winter minimums of about -5 to 1°C. The rating is an absolute minimum, not an average.
How do I overwinter chinese cabbage 'michihili' in the UK?
For a borderline-hardy plant, the UK winter killers are not just cold air but cold wet roots and wind. Improve drainage before winter, mulch the root zone, move containers to a sheltered spot or against a warm wall, and use horticultural fleece on hard-frost nights. Established plants in free-draining soil take far more cold than a recently planted one in heavy, wet ground.
Does UK region change whether chinese cabbage 'michihili' survives?
UK winters vary far more by locality than by latitude. Mild western and coastal areas (the south-west, Pembrokeshire, western Scotland's coast) and urban heat islands run several degrees warmer than inland frost pockets, valleys, and exposed eastern sites at the same latitude. A plant marginal on its RHS rating often survives in a sheltered town garden but fails 20 miles inland — so judge by your own coldest recorded night and microclimate (a south-facing wall, a courtyard) rather than the regional average.
More chinese cabbage 'michihili' care
See the full chinese cabbage 'michihili' care guide, its temperature & humidity needs, and the US (USDA) hardiness version of this page.