Important notes
all parts: As an allium, toxic to cats and dogs — it damages red blood cells. Keep away from pets. ↗
Lumière
Bright, 12–14 h of light.
Arrosage
Keep evenly moist; won't tolerate constant wet (bulb rot).
Température
Cool to moderately warm: 15–24 °C. Very frost-hardy.
Humidité
50–65 %.
Valeurs cibles par méthode et phase
| Phase | pH | EC (mS/cm) | Eau °C | Air °C | Humidité % | Lumière h | Durée (jours) |
|---|---|---|---|---|---|---|---|
| Germination | 6–6.5 | 0.6–1 | 16–22 | 16–22 | 60–70 | 14 | 10 |
| Plantule | 6–6.5 | 1–1.4 | 16–20 | 15–22 | 55–65 | 14 | 28 |
| Végétatif | 6–6.8 | 1.4–2 | 16–20 | 15–24 | 50–65 | 14 | 45 |
| Récolte | 6–6.8 | 1.2–1.8 | 16–20 | 15–24 | 50–65 | 13 | 45 |
| Phase | pH | EC (mS/cm) | Eau °C | Air °C | Humidité % | Lumière h | Durée (jours) |
|---|---|---|---|---|---|---|---|
| Germination | 6.3–6.8 | 0.6–1 | — | 16–22 | 60–70 | 14 | 10 |
| Plantule | 6.3–6.8 | 1–1.4 | — | 15–22 | 55–65 | 14 | 28 |
| Végétatif | 6.3–7.1 | 1.4–2 | — | 15–24 | 50–65 | 14 | 45 |
| Récolte | 6.3–7.1 | 1.2–1.8 | — | 15–24 | 50–65 | 13 | 45 |
| Phase | pH | EC (mS/cm) | Eau °C | Air °C | Humidité % | Lumière h | Durée (jours) |
|---|---|---|---|---|---|---|---|
| Germination | 6–6.5 | 0.6–1 | 16–22 | 16–22 | 60–70 | 14 | 10 |
| Plantule | 6–6.5 | 1–1.4 | 16–20 | 15–22 | 55–65 | 14 | 28 |
| Végétatif | 6–6.8 | 1.4–2 | 16–20 | 15–24 | 50–65 | 14 | 45 |
| Récolte | 6–6.8 | 1.2–1.8 | 16–20 | 15–24 | 50–65 | 13 | 45 |
Problèmes fréquents
Bulb rot and Pythium from waterlogging, thrips, onion fly, downy mildew.
Pests & diseases
| Pest / Disease | Symptom | Organic treatment |
|---|---|---|
| Onion fly | wilting yellow stalks, maggots at the base | insect mesh |
| Downy mildew | pale patches, grey mould | spacing, airflow |
Edible parts
- Leaves · edible from Végétatif — whole stalk edible
- Flowers · edible from Floraison
Techniques de rendement
Harvest whole shanks or cut the tubes above the white shank — they regrow. Clumps can be divided and replanted.
Propagation & pollination
- Method
- division
- Germination time
- 12 days
- Germination temp
- 15-20 °C
- Sowing depth
- 1 cm
- Pollination
- insect
- Hand pollination needed
- no
divide perennial clumps or sow
Companion planting
🟢 Good neighbours: Garden strawberry
Flavor
mild oniony, fresh
Storage
In the fridge, root ends in a little water.
History
The Welsh (bunching) onion comes from East Asia, where it is a staple; it forms slender stalks rather than a big bulb.
Nutrition
Provides vitamins A, C and K.
Sources
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