How to Grow Tokyo Green Mustard
Tokyo Green Mustard
Brassica rapa subsp. nipposinica
vegetableTokyo Green Mustard is a Japanese heirloom brassica known for its tender, dark green leaves with mild, slightly sweet mustard flavor. It grows in a compact, upright form ideal for home gardens and Asian cuisine. The plant matures quickly and tolerates cool weather exceptionally well.
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Example Tokyo Green Mustard timeline · Pittsburgh, PA (Zone 6b)
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Plant Tokyo Green Mustard
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 Tokyo Green Mustard
Around May 27≈ 40 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Tokyo Green Mustard 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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Germination & Seedling
7-14 daysSeeds sprout within 5-7 days; cotyledons emerge followed by first true leaves
Keep soil consistently moist. Provide bright light. Thin seedlings to proper spacing once first true leaves appear. Avoid damping-off by ensuring good air circulation.
Vegetative Growth
20-35 daysPlant develops multiple true leaves forming a compact rosette; leaves are tender and dark green
Maintain consistent moisture and apply balanced fertilizer every 2-3 weeks. Monitor for flea beetles and other brassica pests. Ensure adequate light to prevent bolting.
Full Leaf Development
10-15 daysRosette reaches mature size with 8-12 leaves; plants become full and dense
Continue regular watering and feeding. Cool temperatures slow bolting tendency. Begin light harvesting of outer leaves if desired.
Bolting (in warm weather)
VariableIf temperatures exceed 70°F for extended periods, plants send up flowering stalks; leaves become tougher
Harvest immediately if bolting begins. In cool climates, bolting occurs slowly and plants may remain harvestable longer. Remove bolting plants to prevent cross-pollination with other brassicas.
Harvest-Ready
Ready at 40-60 days, harvestable for 2-4 weeksLeaves are tender, flavorful, and at peak nutritional value; ready for cutting or whole plant harvest
Harvest in early morning for best crispness and flavor. Cut outer leaves or entire rosette depending on desired use. Harvest before plants bolt in warm weather.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers on young plants. Spray neem oil or insecticidal soap. Plant trap crops (radish). Remove infested leaves.
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Hand-pick caterpillars. Use Bacillus thuringiensis (Bt) spray. Install floating row covers. Plant companion herbs like dill to attract parasitic wasps.
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Hand-pick larvae. Apply Bt spray. Use spinosad. Encourage natural predators.
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Spray with insecticidal soap or neem oil. Use yellow sticky traps. Increase humidity and air circulation.
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Ensure good air circulation. Avoid overhead watering. Spray with sulfur or potassium bicarbonate. Remove affected leaves.
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Improve air flow and drainage. Avoid wetting foliage. Apply copper fungicide. Remove severely affected plants.
Uses
Asian Stir-fries & Noodle Dishes
CulinaryTokyo Green Mustard is a staple in Japanese and East Asian cuisine, used fresh or lightly cooked in stir-fries, noodle soups, and hot pots. Its mild mustard flavor and tender leaves complement sesame oil, soy sauce, and garlic beautifully. [source]
Fresh Salads & Raw Consumption
CulinaryYoung, tender leaves can be used raw in salads, providing a subtle mustard bite with pleasant sweetness. The leaves are tender enough for eating fresh without cooking, making them ideal for salad mixes. [source]
Glucosinolate-Rich Cancer-Fighting Compounds
MedicinalTokyo Green Mustard belongs to the Brassica genus, which contains glucosinolates—compounds that research suggests may help prevent cancer and support liver detoxification. These compounds are preserved best when eaten raw or lightly cooked. [source]
High in Vitamins A, C, and K
CulinaryLike other mustard greens, Tokyo Green is extremely nutrient-dense, providing substantial amounts of vitamins A, C, and K, plus calcium and iron. One serving covers significant daily vitamin requirements. [source]
Natural Pest Deterrent & Cover Crop
HouseholdTokyo Green Mustard can be grown as a cover crop or green manure to suppress soil-borne pests and add nitrogen when tilled under. Its compounds also act as natural pest deterrents when intercropped. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Tokyo Green Mustard is best harvested in the morning when leaves are crisp and full of moisture. For baby leaf production, begin harvesting outer leaves when plants are 4-6 weeks old and continue cutting outer leaves as they grow. For full plant harvest, cut the entire rosette 1-2 inches above soil level at 40-60 days. Harvest before bolting occurs, which is hastened by warm temperatures. Successive plantings every 2-3 weeks ensure continuous supply. Cool season growing (spring and fall) produces the most tender, mildest-flavored leaves.
Fun Facts
- 🌱 Tokyo Green Mustard is a heirloom variety originating from Japan, where it has been cultivated for centuries and remains a staple in Japanese home gardens and restaurant kitchens.
- 🌱 Unlike spicy mustard varieties, Tokyo Green has remarkably mild, almost sweet flavor when grown in cool seasons—the taste intensifies and becomes more peppery in warm weather, so spring and fall harvests are preferred.
- 🌱 This plant's scientific name 'nipposinica' means 'Japanese Chinese,' reflecting its status as a Japanese refinement of Chinese mustard genetics.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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