How to Grow Green Onion Tokyo Long Green
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Green Onion Tokyo Long Green
Allium fistulosum
vegetableTokyo Long Green is a Japanese bunching onion variety prized for its long, slender white and green stems with a mild, sweet flavor. It produces no true bulb, instead forming tender green tops ideal for fresh use in salads, stir-fries, and Asian cuisine. This fast-growing variety is perfect for succession planting and can be regrown from cuttings.
When should you plant Green Onion Tokyo Long Green in your zone?
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Example Green Onion Tokyo Long Green timeline · Pittsburgh, PA (Zone 6b)
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Plant Green Onion Tokyo Long Green
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 Green Onion Tokyo Long Green
Around May 27≈ 40 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Green Onion Tokyo Long Green dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; grows year-round in mild climates
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Get my Green Onion Tokyo Long Green timeline →Growth Stages
Seedling
1-2 weeksThin, grass-like shoots emerge; develops first true leaves
Keep soil moist; thin seedlings to 2-4 inches apart if direct seeding; provide gentle light; maintain 60-70°F for best germination
Vegetative Growth
3-4 weeksMultiple green shoots develop from base; white lower sections elongate; plant forms loose clump
Maintain consistent moisture; avoid overwatering; fertilize lightly with balanced or nitrogen-rich fertilizer every 3 weeks; thin if crowded
Stem Elongation
2-3 weeksWhite sheaths extend 8-12 inches long; green tops darken and thicken; plant reaches harvest maturity
Hill soil around base to blanch white sections and prevent green discoloration; ensure adequate water during this phase; reduce nitrogen to avoid excess foliage at expense of white length
Mature/Harvest Ready
Variable; ready to harvest from 40 days onwardFull-length stems with firm white bases and vibrant green tops; typically 10-14 inches tall; no flowering
Can harvest at any point; for maximum white length allow 55-60 days; plant continues producing new growth if harvested selectively from outside of clump
Regrowth
10-14 days per regrowth cycleIf harvested by cutting above soil line, new shoots emerge from base within 1-2 weeks
Water and fertilize lightly after cutting harvest; expect 2-3 regrowth cycles before replanting recommended; can cut multiple times per season
Common Pests
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Use floating row covers; remove affected plants; avoid overwatering; practice crop rotation; apply spinosad if infestation is severe
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Spray with neem oil or insecticidal soap; maintain adequate moisture; remove heavily infested leaves; encourage natural predators
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Hand-pick early morning; use copper tape barriers; set beer traps; apply diatomaceous earth around plants
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Spray with strong water stream; apply neem oil or insecticidal soap; introduce beneficial insects like ladybugs
Uses
Fresh Asian Cuisine
CulinaryTokyo Long Green is a staple in Japanese, Chinese, and Korean cooking, used fresh in stir-fries, soups, noodle dishes, and as a garnish for ramen. The mild, slightly sweet onion flavor and tender texture make it ideal for minimal cooking to preserve crispness. [source]
Salads and Raw Applications
CulinaryThe tender white and green portions add a delicate onion flavor to salads, salsas, and cold dishes without the harsh bite of regular onions. Both the white and green sections are edible raw. [source]
Garnish and Finishing Touch
CulinarySliced green tops provide color, mild flavor, and textural contrast when sprinkled on soups, baked potatoes, eggs, and grain bowls at the last moment. [source]
Continuous Harvest and Regrowth
HouseholdTokyo Long Green can be regrown from cuttings in water indoors on windowsills, providing fresh green onions for weeks with minimal effort. This makes it ideal for container growing and indoor kitchen herb gardens. [source]
Allium Health Properties
MedicinalLike all onions, bunching onions contain compounds such as allicin and quercetin with potential anti-inflammatory and antioxidant properties. Traditional medicine has used them to support immune function and digestive 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 when green tops are 6-8 inches tall, typically 40-50 days from planting. For maximum white length and mild flavor, wait 55-60 days. Harvest by cutting leaves and stems 2-3 inches above soil line with clean scissors to encourage regrowth, or pull entire bunches when needed. Morning harvest yields the crispest, most tender stems. Multiple harvests possible from single planting via regrowth method.
Fun Facts
- 🌱 Tokyo Long Green is a Japanese heirloom variety that has been cultivated for centuries and is sometimes called 'Japanese bunching onion' or 'negi' (葱) in its native country.
- 🌱 Unlike bulbing onions, bunching onions form multiple shoots from the base that all elongate simultaneously, creating a dense clump of stems rather than a single bulb.
- 🌱 Green onions can be regrown indefinitely by placing cut white bases in a glass of water on a sunny windowsill—they will develop new green tops within 1-2 weeks and can be re-harvested multiple times.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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