Brassica rapa var. nipposinica ‘Red Knight’


  • Botanical name: Brassica rapa var. nipposinica 'Red Knight'
  • Common name: Mizuna
  • Family: Brassicaceae
  • Plant Type: Vegetable

Mizuna, Brassica rapa var. nipposinica, is a Japanese brassica that is becoming increasingly popular for stir-fries. It is also called Kyona or potherb mustard. Not only is it good to eat, it’s also quite decorative, with glossy, serrated, dark green leaves and narrow white stalks, looking good in flower beds and as edging.


Mizuna is vigorous, adaptable and easy to grow in most soils. Leaves have a mild mustard flavour. The usual sowing time, outside, is from early to late summer, but it can be sown in late spring or early summer, when it may have a tendency to bolt. Another alternative is to sow in early autumn, for transplanting under cover.


Mizuna ‘Red Knight’ is a hybrid variety with dark red leaves, perfect for using in summer salads. Plants are vigorous, growing as a large rosette of finely serrated, feathery leaves. Mizuna is tolerant of both heat and cold, and grows best in moist conditions.

How to grow Brassica 'Red Knight'

  • Plant size

    27cm height

    30cm spread

  • Aspect

    South facing, west facing

  • Sun exposure: Dappled shade, full sun
  • Hardiness: Half hardy
  • Soil type: Chalky / alkaline / clay / heavy / moist / well drained / light / sandy

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do not Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December


Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December


Do not Harvest in January

Do not Harvest in February

Do not Harvest in March

Do not Harvest in April

Do not Harvest in May

Do not Harvest in June

Do Harvest in July

Do Harvest in August

Do Harvest in September

Do Harvest in October

Do not Harvest in November

Do not Harvest in December

Brassica 'Red Knight' and wildlife

Brassica 'Red Knight' has no particular known value to wildlife in the UK.

Is Brassica 'Red Knight' poisonous?

Brassica 'Red Knight' has no toxic effects reported.

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Cats

No reported toxicity to Dogs

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People

Plants that go well with Brassica 'Red Knight'