How to Grow Mustard Mizuna

Mustard Mizuna

Brassica juncea var. japonica

vegetable

Mustard mizuna is a Japanese leafy green with delicate, feathery leaves and a peppery, mustardy flavor. It's a fast-growing brassica that adds texture and spice to salads and stir-fries. This cool-season crop thrives in spring and fall gardens, producing abundant tender greens in just 3-4 weeks.

Looking for a specific variety?

Purple Mizuna Kyoto Purple Summer Mizuna Wakaogi Tokyo Mizuna Green Mizuna

Growing Conditions

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Sun: Full sun to partial shade; 4-6 hours of direct sunlight daily; afternoon shade beneficial in hot climates

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Water: Keep soil consistently moist but not waterlogged; water deeply 2-3 times per week; increase frequency during hot, dry periods; drip irrigation or soaker hoses preferred to avoid wetting foliage

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Spacing: 6 inches

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Days to maturity: 25-40 days

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Planting depth: 0.25 inches (seeds sown directly); transplants at soil level

Soil

Type: Well-draining loamy soil rich in organic matter

pH: 6.0-7.5

Amendments:

Compost Well-rotted manure Peat moss or coco coir

Growing Zones

Find your zone →

Zones 4-9; grows best in cool seasons (spring and fall)

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

Growth Stages

Germination

5-7 days

Tiny seedlings emerge with first true leaves visible within 5-7 days of sowing; cotyledons are heart-shaped

Keep soil moist; maintain temperatures between 50-70°F; thin seedlings to proper spacing if direct sown

Seedling

7-10 days

Young plants develop 2-4 true leaves; feathery leaf structure begins to form; plant height is 2-3 inches

Provide consistent moisture; ensure adequate light to prevent leggy growth; thin crowded seedlings to reduce competition

Vegetative Growth

10-20 days

Plant develops numerous feathery, deeply cut leaves in a rosette formation; characteristic mustard-green color deepens

Maintain consistent watering; apply balanced fertilizer mid-growth if needed; monitor for pests closely; keep area weed-free

Mature Leafy Stage

3-5 days before bolting in warm weather

Full rosette of tender, peppery leaves reaches harvest-ready size (6-8 inches diameter); leaves are fully feathery and at peak flavor

Begin selective harvesting of outer leaves; continue watering consistently; avoid bolting by harvesting before hot weather arrives

Bolting (if left unharvested)

Varies; accelerates in heat

Plant elongates and produces flowering stems with small yellow flowers; leaves become tougher and more bitter

Harvest before this stage for best eating quality; flowering stems are edible but lower quality; let some plants bolt for seed saving if desired

Companion Planting

Plan your garden →

Plant with:

Radish Carrot Beet Spinach Lettuce Pea Dill Chamomile Marigold

Avoid planting near:

Tomato Pepper Eggplant Fennel Cabbage Broccoli Cauliflower Kohlrabi

Common Pests

Row covers; handpick caterpillars; Bacillus thuringiensis (Bt) spray; neem oil; encourage parasitic wasps
Row covers; diatomaceous earth; neem oil; insecticidal soap; reflective mulches; avoid over-fertilizing with nitrogen
Strong water spray to dislodge; insecticidal soap; neem oil; encourage natural predators like ladybugs; reflective mulches
Yellow sticky traps; insecticidal soap; neem oil; reflective mulches; improve air circulation
and
Handpick; beer traps; copper tape barriers; diatomaceous earth; encourage ground beetles

Uses

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Salad greens and fresh eating

Culinary

Tender young leaves add peppery bite and delicate texture to mixed salads, Asian noodle bowls, and fresh preparations. The feathery appearance also provides visual appeal to salad plates. [source]

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Cooked greens and stir-fries

Culinary

Mature leaves can be lightly sautéed in oil and garlic as a side dish or added to stir-fries, soups, and Asian cuisines. The peppery flavor complements ginger, garlic, and soy-based dishes. [source]

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Glucosinolate content

Medicinal

As a brassica, mustard mizuna contains glucosinolates, compounds that convert to isothiocyanates in the body, which have been studied for potential anti-inflammatory and anti-cancer properties. [source]

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Microgreens production

Culinary

Mizuna seeds germinate quickly and densely, making them ideal for microgreens cultivation indoors. Microgreens are harvested at 1-2 weeks for concentrated flavor and nutrition. [source]

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Pollinator support and beneficial insect habitat

Wildlife

When allowed to flower, mustard mizuna produces small yellow blooms that attract bees and other pollinators. The plant also provides habitat for beneficial insects that control garden pests. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Begin harvesting outer leaves when plant is 4-6 inches tall, about 3-4 weeks after sowing (or 2-3 weeks after transplanting). Use scissors or pinch leaves off by hand, leaving the central growing point intact for continued harvesting. Harvest in the morning for best flavor and texture. Can do single plant harvests or cut entire plant 1 inch above soil line for regrowth. Flavor peaks in cool weather; harvest before bolting in warm seasons. Young, tender leaves are most desirable; mature leaves become tougher and more peppery.

Fun Facts

🌱 Mustard mizuna is primarily a Japanese vegetable that has been cultivated for centuries, particularly in Kyoto, where it's a staple in traditional cuisine.
🌱 The name 'mizuna' comes from Japanese words meaning 'water greens' because the plants thrive in moist conditions and are traditionally grown in wet rice paddies.
🌱 Mizuna is sometimes called 'feather-leaf mustard' or 'Japanese mustard greens' and can be ready to harvest in as little as 20-25 days, making it one of the fastest-growing leafy greens.

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