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UK Delivery 95p. Free On Orders Over £12.50

Mizuna Seeds

Botanical - Brassica rapa (Nipposinica or Japonica)


Seed Count:
220 Seeds
Usually despatched within 24 hours
See "Delivery Charge" tab below
Price £1.79
Discounts applied automatically at checkout.
  • Buy 2 - 3 and pay only £1.64 each
  • Buy 4 or above and pay only £1.49 each

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220 Seeds.

Other Names - Oriental Leaves, Japanese Mustard…

Mizuna has a dark green, narrow, serrated leaf. It had a mustardy flavour, is very prolific and fairly trouble free to grow. Mizuna is extremely hardy and is an easy green leaf to grow over the winter months. Harvest as a cut and come again for a long cropping season. For mild flavoured leaves harvest when small and young.

  • Very hardy, an ideal easy to grow winter vegetable.
  • Suitable for containers.
  • Fast growing and very prolific.

Suitable For - Vegetable plot, raised beds, container garden, limited space

Sowing Months - July - September, November & February

Harvest - September - April

Gardening is about finding the right balance! Try growing Companion Plants close by to help deter pests.

  • Mizuna grows well next to leeks and parsley.

Soil Preperation

If the soil is poor add some well rotted manure or compost to the bed a few months before sowing or planting. Remove any slug havens such as weeds, stones, wood etc. from the area as slugs and snails love mizuna leaves.

General InformationSowing & Planting Information
Habit Biennial, grown as an annual Module Grown & Transplants
Type N/A Distance between plants 20 cm
Position Cool location Distance between rows 25 cm
Average height 25 cm Direct Sowing
Average spread 40 cm Sowing distance between plants 1 cm
Hardiness Hardy Distance between rows 25 cm
Overwintering Undercover Sowing depth 1 cm
Soil Ph 6.5 - 7.0 Germination temperature 8 to 20℃
    Days to germination 7 - 14 days

Sowing Guide

Early Sowing/Module Sowing

Sow 3 - 4 seeds per 4 cm module. As soon as the seedlings start to germinate move to an area with good daylight exposure, a windowsill or greenhouse. Mizuna grows fast especially in summer and autumn, 1 - 2 weeks after germination plant out into their final growing position. Winter sowings will need to be left to grow larger before planting out.
Harden off over 7 - 10 days so that the plant can acclimatise to the outdoor temperature slowly. Plant at the distance suggested above. Firm the soil around each plant and water well. Summer sown mizuna will benefit from a covering of a fine insect mesh to protect the young leaves from insect damage. Winter and spring sown crops will benefit from a covering of horticultural fleece.

Direct Sowing

Sow thinly (aim for 1 seed per 1 cm) at the depth and row distance suggested above. Cover the seeds with soil and water well. Summer sowings will benefit from being covered by some fine insect mesh to protect the young seedlings from insect damage.
Winter and spring sowings should be sown indoors for planting out a few weeks later. When the seedlings are big enough to handle thin to 5 cm apart for small plants, 10 cm apart for medium size plants and 20 cm apart for large plants.
Sow summer crops little and often, every 10 - 14 days. For autumn, winter and spring harvest sow one sowing in September one in early November then one in late February.

Growing On

Water well in dry weather. Weed often to keep competing plants under control. Mizuna is hardy and can survive outdoors uncovered over a normal winter, however if covered with a cloche or horticultural fleece before the cold frosty weather arrives the plants will produce better quality leaves.


This fast growing plant can be ready to harvest in 4 - 5 weeks after sowing. To harvest, cut across all of the leaves with a sharp knife or scissors about 3 - 4 cm above ground level. New leaves will regrow and in a few weeks another crop will be ready to harvest.
After about 3 - 4 harvests the plants will normally run to seed. The growth of mizuna leaves will slow down over the winter months however by February growth will start to grow strong again until April when the plants naturally run to seeds. The flowers and stems produced can also be eaten.


The leaves become hotter with age. If mild flavoured leaves are preferred keep the plants small by harvesting regularly.

Delivery Information

All products on this website are for delivery to the UK only.

(Including Northern Ireland, the Highlands & Islands, Scilly Isles, Channel Isles and the Isle of Man). Delivery charges to these areas are the same as UK mainland stated below (with no additional surcharge). Delivery however may take longer than the times stated due to weather, distance etc.)

FREE DELIVERY on all orders over £9.98

When applicable, free 2nd class delivery will be automatically calculated at checkout.

STANDARD DELIVERY - Royal Mail 2nd Class (3 - 5 working days) - £0.95

For orders under £9.98, the "Standard Delivery" charge will be added automatically at checkout.

FAST DELIVERY - Royal Mail 1st Class (1 - 2 working days) - £1.52

If preferred please select this delivery option at checkout.

For further information please visit our Delivery, Postage & Packaging page.

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The 14 day cooling off period.

Under the 'Consumer Contract Regulation Act' you the consumer have the right to cancel a long distance order (such as a website order) at any time from the moment the order is placed up until 14 calendar days from the day after the goods are received.

So if for whatever reason you change your mind within this time and wish to return the goods, simply send us a 'Cancelation Form' (full details can be found on our Your Right to Cancel page). On receiving the undamaged goods back from you we will fully reimburse you with all payments received including the cost of standard delivery. You will however need to bear the cost of returning the goods back to us.

For full details please visit our Your Right to Cancel page.

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If however you receive goods that have been damaged, incorrect or missing, let us know within 72 hours of receiving the goods and we will either fully refund you (including postage costs), promptly send you a replacement or credit your Groseeds account, depending on your preference.

For full details, including how to contact us, please visit our Returns & Refunds page.

Faulty Goods.

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If however within the 12 months you find the goods to be faulty please contact us ASAP so that we can resolve the issue promptly. Full instructions, including how to contact us can be found on our Returns & Refunds page.

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