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Cutting an onion releases an enzyme that forms a volatile sulfur gas (syn-propanethial-S-oxide), which irritates the eyes and makes you tear up.
Allium cepa
vegetable
Bees
Bumblebees
Butterflies
Pest controlSlow-growing biennial usually grown from sets (mini bulbs) for one-year harvest. Day-length sensitive: choose long-day varieties for northern Europe, short-day for the south. Pull when tops yellow and fall, cure in a shaded airy spot for two weeks before storage.
🐛 Prone to: Thrips.
Attract Minute pirate bugs, Hoverflies, Lacewings to keep them in check — plant African Marigold, Angelica and Anise nearby.
🌼 Beneficial companion — draws Hoverflies that help control Aphids, Thrips on neighbouring plants.
Well-draining, fertile soil with pH 6.0-7.5. Prefers loose, crumbly texture for bulb development. Moderate organic matter.
Did you know?
Cutting an onion releases an enzyme that forms a volatile sulfur gas (syn-propanethial-S-oxide), which irritates the eyes and makes you tear up.
Cichorium intybus (Radicchio)
vegetableThrives in the same full sun, moderate water conditions as Onion
