Spring Onion (Scallion)
Allium fistulosum
Malay names: Daun Bawang
Easy hydro crop; continuous cuttings possible; tolerates Malaysian heat with shade.
🌞 Light & Temperature
Light: Bright light to full sun (4–6 h); some shade in extreme heat
Temperature: 20–34°C
🪴 Container & Medium
Container: NFT/DWC; 2 inch net pots; bunch 2–3 seedlings per site.
Medium / Solution: Medium: clay pebbles; Solution: pH 6.0–6.5, EC 1.6–2.2 mS/cm
💧 Watering / Solution Maintenance
Schedule: Top-up daily; change 10–14 days
Top-up: Maintain steady flow/level
pH 6.0–6.5; EC 1.6–2.2 mS/cm
🧪 Nutrients
Type: Leafy nutrient with sulfur for flavor
Frequency: Check EC weekly; change 10–14 days
Dosage/EC: EC 1.6–2.2 mS/cm; pH 6.0–6.5
🍓 Harvest
Start: 6–8 weeks from sowing
Seasonality: Year-round
Duration: Cut-and-come-again for months
Harvest Indicators: Stems pencil-thick; leaves upright and green
Tips: Harvest outer stems; allow centers to regrow.
🌱 Propagation
Seeds; also re-root from store-bought bases.
🐛 Pests & Diseases
- Thrips/aphids: Blue/yellow traps; neem 1%; improve airflow.
🌦️ Seasonal Notes (Malaysia)
Use shade and airflow during monsoon.
📝 System Notes
Bunch 2–3 per site for thicker harvests.
💡 Extra Care Tips
- Supplement sulfur (Epsom contains Mg, not S as sulfate alone; use balanced nutrient)
- Trim tips to reduce wind damage
Note
EC and pH are guidelines—adjust to plant response and your water source. In monsoon humidity, increase airflow and reduce overcrowding to limit disease.