How to Grow Scallion
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Scallion
Allium fistulosum
vegetableScallions, also known as green onions or bunching onions, are a cool-season vegetable that produces long, slender green leaves with white bulbous bases. They are milder than bulbing onions and can be harvested at various stages, from immature sprouts to nearly mature plants. Quick-growing and space-efficient, scallions are ideal for both gardeners and container cultivation.
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Example Scallion timeline · Pittsburgh, PA (Zone 6b)
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Plant Scallion
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 Scallion
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Scallion dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; prefers cool to moderate temperatures
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Germination & Seedling
7-14 daysTiny seeds sprout thin green shoots with a single leaf blade emerging. Very delicate at this stage.
Keep soil consistently moist. Provide bright light to prevent leggy growth. Thin seedlings to proper spacing once 2-3 inches tall.
Vegetative Growth
4-8 weeksMultiple thin green leaves develop from the base. The white basal section begins to form. Plant reaches 6-12 inches tall.
Maintain consistent moisture and full sun. Fertilize every 2-3 weeks with balanced fertilizer. Remove any yellowing outer leaves.
Bulb Development
4-6 weeksThe white basal section becomes more pronounced and swollen. Green tops continue to elongate. Plant reaches 12-18 inches.
Continue regular watering and feeding. Hill soil slightly around base to encourage white bulb formation. Monitor for pests.
Mature Plant
ongoing until harvestFull-sized scallion with thick green tops (12-18+ inches) and well-developed white bulbous base (1/2 to 1 inch diameter).
Reduce fertilizer frequency. Continue watering as needed. Ready for harvest at any time.
Harvest & Regrowth
2-3 weeks per regrowth cyclePlant is harvested at ground level or leaves are cut while roots remain. Regrowth occurs within 2-3 weeks for successive harvests.
Cut or pull carefully to avoid damaging roots. Water after harvest. New shoots will emerge from remaining roots.
Common Pests
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Use row covers on young plants, remove affected plants, apply neem oil or insecticidal soap, practice crop rotation
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Spray with water to dislodge, use insecticidal soap, apply neem oil, introduce beneficial predatory mites
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Ensure excellent drainage, avoid overwatering, rotate crops, use disease-resistant varieties
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Improve air circulation, avoid overhead watering, apply fungicide if severe, remove infected leaves
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and
Hand-pick in early morning, use beer traps, apply diatomaceous earth, encourage natural predators
Uses
Fresh cooking & garnish
CulinaryScallions are versatile in Asian cuisines, soups, stir-fries, salads, and as a fresh garnish. Both white and green parts are edible, with the white base having a stronger onion flavor and the green tops adding mild onion notes with a fresh bite. [source]
Asian cuisine staple
CulinaryEssential in Chinese, Japanese, and Korean cooking for noodle dishes, dumpling fillings, and as a finishing element. Scallions are a key component of traditional dishes like jjuk (Korean rice porridge) and Chinese egg fried rice. [source]
Traditional medicine use
MedicinalScallions contain quercetin and allicin, compounds with potential anti-inflammatory and antimicrobial properties. Used in traditional Chinese and folk medicine to support immune function and digestive health. [source]
Indoor container growing
HouseholdScallions are ideal for windowsill and indoor container growing due to their compact size and fast growth. They can be regrown from kitchen scraps by placing cut bases in water, regenerating new green shoots within days. [source]
Pollinator support
WildlifeIf allowed to flower (bolting), scallions produce delicate white or pale purple flowers that attract pollinators and beneficial insects. The flowers are also edible with a mild onion flavor. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Scallions can be harvested at any stage. For baby scallions (2-3 weeks), harvest when 6-8 inches tall. For mature scallions, harvest at 12-18 inches tall. Cut plants at ground level or pull entire plant; roots may regrow for 2-3 additional harvests. Harvest outer leaves individually by cutting 1-2 inches above soil for continuous harvesting. Best flavor when harvested in cool weather.
Fun Facts
- 🌱 Scallions are one of the few onion varieties that don't form large storage bulbs; they have been selectively bred for bunching growth habit rather than single bulb development.
- 🌱 Scallion plants can produce up to 3-4 successive harvests by regrowing from the root system after being cut, making them an economical crop.
- 🌱 A single scallion bulb placed in water on a windowsill can regenerate complete new shoots within 5-7 days, allowing continuous harvesting for months without replanting.
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