How to Grow Japanese Mizuna
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Japanese Mizuna
Brassica rapa subsp. nipposinica
vegetableJapanese Mizuna is a delicate Asian leafy green with feathery, finely-cut leaves that form loose rosettes. It has a mild, slightly peppery flavor and tender texture that makes it excellent raw in salads or lightly cooked. This cool-season crop grows quickly and is highly productive, often ready to harvest in just 30-50 days.
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Example Japanese Mizuna timeline · Pittsburgh, PA (Zone 6b)
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Plant Japanese Mizuna
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Japanese Mizuna
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Japanese Mizuna dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; prefers cooler seasons (spring and fall)
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Get my Japanese Mizuna timeline →Growth Stages
Germination & Seedling
7-10 daysTiny seedlings emerge within 5-7 days with cotyledons followed by true feathery leaves. First true leaves are deeply divided and delicate.
Keep soil warm (60-70°F) and consistently moist. Thin crowded seedlings to proper spacing. Provide moderate indirect light if starting indoors.
Vegetative Growth
15-25 daysPlant develops 4-6 true leaves and begins forming characteristic feathery foliage in loose rosettes. Leaves become increasingly frilly and delicate.
Maintain consistent moisture and cool temperatures (50-70°F). Begin light fertilizing weekly with balanced or nitrogen-rich fertilizer. Thin to proper spacing if direct seeded.
Leaf Development & Maturity
10-15 daysRosette expands with multiple layers of fully-formed, deeply-lobed feathery leaves. Plant reaches harvestable size with tender, flavorful foliage.
Continue regular watering and weekly fertilization. Monitor for bolting in warm conditions. Apply afternoon shade if temperatures exceed 75°F consistently.
Harvest & Decline
Variable; harvest at peakPlant reaches peak flavor and tenderness. As temperatures warm or day length increases, plant may begin to bolt and flower.
Harvest outer leaves or entire plant before bolting occurs. Succession plant every 2-3 weeks for continuous harvest. Bolting plants become bitter and tough.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers on young plants, dust with diatomaceous earth, or spray with neem oil. Trap crops of radish may attract beetles away.
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Use floating row covers, hand-pick caterpillars, spray with Bacillus thuringiensis (Bt), or apply spinosad.
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Spray with strong water stream, use insecticidal soap, or apply neem oil. Encourage beneficial insects like ladybugs.
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Hand-pick, use copper barriers, diatomaceous earth, or beer traps. Remove debris that provides shelter.
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Use yellow sticky traps, spray with neem oil or insecticidal soap. Improve air circulation.
Uses
Raw Salads & Garnishes
CulinaryThe delicate, feathery leaves add visual elegance and mild peppery flavor to salads, slaw, and as a garnish on Asian dishes. Young tender leaves are best eaten raw. [source]
Stir-fries & Cooked Dishes
CulinaryMizuna wilts quickly and adds texture to Asian stir-fries, soups, and sautéed preparations. Its mild flavor complements garlic, ginger, and soy-based sauces. [source]
Nutritional & Antioxidant Benefits
MedicinalMizuna is rich in vitamins A, C, K, and glucosinolates (compounds with potential anti-cancer properties). It supports bone health, immune function, and anti-inflammatory response. [source]
Microgreens & Sprouts
CulinaryMizuna seeds germinate quickly and are excellent for growing as microgreens indoors for tender, flavorful shoots ready in 10-14 days. [source]
Pollinator & Beneficial Insect Support
WildlifeAllowing mizuna to bolt and flower provides early-season nectar and pollen for bees and other pollinators, supporting garden ecosystem health. [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 (cut-and-come-again method) for continuous production, or wait 30-50 days and harvest entire plant at base. Young, tender leaves are most flavorful. Harvest in the morning for best flavor and crispness. Can be harvested at baby-leaf stage (25-30 days) for salad mixes. Mizuna bolts in warm weather, so harvest promptly before flower formation.
Fun Facts
- 🌱 Mizuna has been cultivated in Japan for centuries and appears in historical Japanese cuisine dating back to the Edo period (1603-1868).
- 🌱 The name 'mizuna' literally means 'water vegetable' in Japanese because it thrives in moist conditions and was traditionally grown in paddy fields.
- 🌱 Mizuna is one of the fastest-growing Asian greens and can be harvested multiple times from a single planting using the cut-and-come-again method, often yielding 4-6 harvests.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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