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How to Grow American Mizuna

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American Mizuna

Brassica rapa var. nipposinica

vegetable

American Mizuna is a Japanese mustard green with delicate, feathery, finely-cut leaves that form loose rosettes. It has a mild, slightly peppery flavor and tender texture, making it popular for salads and Asian cuisine. The plant is cold-hardy, fast-growing, and prolific, often producing tender leaves in just 3-4 weeks.

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Example American Mizuna timeline · Pittsburgh, PA (Zone 6b)

  1. Plant American Mizuna

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest American Mizuna

    Around May 17

    ≈ 30 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact American Mizuna dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun to partial shade; 4-6 hours of direct sunlight daily optimal
💧
Water: Keep soil consistently moist but not waterlogged. Water regularly, especially during dry periods. Mulch to retain moisture and keep soil cool.
📏
Spacing: 6 inches
📅
Days to maturity: 30-50 days from seed to harvest-ready leaves
🌱
Planting depth: 0.25

Soil

Type: Well-draining, fertile loamy soil rich in organic matter
pH: 6.0-7.5
Amendments:
Compost aged manure nitrogen-rich fertilizer

Growing Zones

Find your zone →

Thrives in zones 3-9; tolerates cold and prefers cool seasons

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

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Growth Stages

1

Seedling

7-10 days

Tiny seed leaves emerge, followed by first true leaves with characteristic feathery outline beginning to show

Keep soil moist but not soggy. Thin seedlings to proper spacing to avoid crowding. Protect from heavy rain.

2

Vegetative Growth

14-25 days

Plant develops increasingly intricate, finely-cut feathery foliage. Loose rosettes form with multiple tiers of delicate leaves.

Continue consistent watering. Apply balanced fertilizer every 2-3 weeks. Monitor for pests. Cooler temperatures promote slower bolting.

3

Harvest-Ready

5-10 days

Plant reaches 6-12 inches tall with abundant tender leaves ready for picking. Leaves remain mild and delicate before bolting.

Begin harvesting outer leaves when 4-6 inches long. Harvest regularly to encourage more leaf production and delay bolting.

4

Bolting

Variable; plant life ends after seed set

Plant sends up a flowering stalk; leaves become tougher, more bitter, and less palatable

Harvest all remaining leaves immediately or allow to flower for seed production. Cool weather delays this stage.

Companion Planting

Plan your garden →

Plant with:

Basil dill chamomile buckwheat carrot onion spinach lettuce chard

Avoid planting near:

Tomato fennel cabbage broccoli other brassicas in same family

Common Pests

  • Row covers for seedlings, neem oil spray, diatomaceous earth, reflective mulch

  • Row covers, hand-picking, Bacillus thuringiensis (Bt), spinosad spray

  • Strong water spray, insecticidal soap, neem oil, beneficial insects like ladybugs

  • and

    Hand-picking at night, beer traps, copper tape barriers, diatomaceous earth

Uses

🍳

Salads and Fresh Eating

Culinary

Mizuna's feathery leaves add delicate texture and mild peppery flavor to salads. The tender leaves require no cooking and are excellent in sushi rolls, Asian noodle dishes, and as a garnish. [source]

🍳

Sautéed and Cooked Greens

Culinary

Despite being eaten fresh, mizuna can be lightly sautéed, steamed, or added to stir-fries. Cooking mellows the flavor further and works well in Asian cuisine. [source]

💊

Nutritional Benefits

Medicinal

Mizuna is rich in vitamins C and K, calcium, and glucosinolates (compounds with potential anti-cancer properties). It supports bone health and immune function. [source]

🏠

Microgreens Production

Household

Mizuna is an excellent microgreen crop, ready to harvest in 7-10 days. The delicate, attractive shoots add visual appeal and flavor to dishes. [source]

🦋

Pollinator Attraction

Wildlife

When allowed to flower, mizuna's small yellow flowers attract bees and other pollinators, supporting garden biodiversity. [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 4-6 inches long, typically 3-4 weeks after planting. Use scissors or pinch by hand to remove individual leaves. Harvest regularly and in the morning for crispest texture. The plant will continue producing new leaves. For full plant harvest, cut at soil level or pull entire plant.

Fun Facts

  • 🌱 Mizuna is a traditional Japanese vegetable also called 'water greens' because it thrives with abundant moisture and grows best in cool, wet conditions.
  • 🌱 The plant is extremely cold-hardy and can be grown as a fall and winter green in many climates, often producing tender leaves even after light frosts.
  • 🌱 A single mizuna plant can produce hundreds of individual leaves if harvested regularly by pinching outer leaves, making it one of the most productive garden greens.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Bolt Full Sun Mulch Partial Shade True Leaves
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