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Wholesale Red Mizuna Seeds Brassica rapa var. japonica (Japanese mustard)

Starting at £3.99

Approx 400 seeds per gram

Red mizuna is a colorful Japanese leafy green known for its finely cut, feathery leaves and mild peppery taste. It belongs to the species Brassica rapa, part of the mustard family.


🌱 Description

  • Leaves: Deep red to burgundy with serrated, fringed edges

  • Stems: Slender, usually green to reddish

  • Growth habit: Fast-growing, upright rosette

  • Height: 20–40 cm (8–16 inches)


🌢️ Flavour

  • Mild mustard flavour

  • Slight peppery kick

  • Less sharp than arugula

  • Tender and crisp texture


🌼 Growing Characteristics

  • Cool-season crop (spring and autumn are ideal)

  • Tolerates light frost

  • Quick to mature (baby leaves in 20–25 days)

  • Cut-and-come-again harvesting


🌱 Sowing Guide

  • Sow directly outdoors early spring or late summer

  • Sow seeds 0.5–1 cm deep

  • Space plants 15–20 cm apart

  • Keep soil evenly moist

  • Germination: 5–10 days


🍽️ Culinary Uses

  • Mixed salads (adds colour contrast)

  • Stir-fries

  • Soups

  • Sandwiches

  • Lightly wilted as a side dish

Red mizuna is especially valued for adding vibrant colour and a gentle mustard flavour to fresh salad mixes.

25g | 50g | 100g | 250g | 500g | 1kg

Useful Information

Sowing & Growing

Mizuna seeds can be started under cover as early as January and can be grown throughout the year. Sow the seeds in pots or modular trays filled with damp seed compost and cover lightly with fine sifted compost. Ensure the pots and trays are not left to dry out. It’s better to lay the pots and trays in water rather than water from overhead. Seeds will germinate in 3-5 days, after which they can be transplanted to individual pots or thinned to one plant per module when 2cm-3cm high. Young plants are best acclimatised (hardened off) in a cold frame or cold greenhouse prior to planting out in their permanent positions.

Seeds can also be sown direct into well prepared seed beds from March onwards, and because they are very fast growing, several sowings can be made throughout the summer. Draw a furrow using the edge of a hoe and lightly sow the seeds at a depth of 1cm then lightly cover with fine soil. Use a watering can with a fine rose attachment to gently water the furrows. Once germination has taken place, the plants can be thinned according to their intended use.

Additional information

Packet Size

25g | 50g | 100g | 250g | 500g | 1kg

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