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Spring Onion

Allium fistulosum

vegetable

Spring onions (also called bunching onions) are perennial alliums harvested as immature plants with tender white bases and green tops, used fresh or in cooking. They mature rapidly (30–60 days) and can be succession-planted for continuous harvests or left to perennialize for repeated cutting. Both bulbless and forming varieties are available.

Spring Onion

Common Problems

Select the problem your Spring Onion is experiencing to get a treatment guide.

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Slow Growthchevron_right
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Yellow Leaveschevron_right
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Holes In Leaveschevron_right
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Brown Spotschevron_right

Care Guide

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Light
Full sun to part shade, 4–6 hours daily; tolerates light shade, especially in hot climates
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Water
Keep soil consistently moist with 0.5–1 inch per week; avoid waterlogging; reduce water if plants are left to perennialize
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Soil
Well-draining, fertile loam with pH 6.0–7.0; tolerates a range of soils; add compost for productivity
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Fertiliser
Apply balanced fertilizer (10-10-10) monthly; or side-dress with nitrogen every 3–4 weeks for continuous tender growth
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Temperature
Prefers 60–70°F (16–21°C); cold-hardy and can overwinter in mild climates; tolerates light frosts; slower growth below 50°F (10°C)
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Humidity
Moderate humidity (50–70%); good air circulation prevents fungal diseases

Toxicity

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Toxic to cats and dogs due to thiosulfate compounds; safe for children in normal culinary quantities

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Spring Onion Care Guide — Allium fistulosum | GreenScout