Amaranth (Bayam Hijau)
Amaranthus tricolor
Malay names: Bayam Hijau, Bayam
Fast tropical leafy green; very suitable for NFT/DWC in Malaysian heat with light shade.
🌞 Light & Temperature
Light: Bright light to partial sun (4–6 h)
Temperature: 24–36°C
🪴 Container & Medium
Container: NFT/DWC; 2 inch net pots; 15–30 L reservoir per 8–12 plants; 30–50% shade net in hottest periods.
Medium / Solution: Medium: clay pebbles/rockwool; Solution: pH 5.8–6.5, EC 1.4–2.0 mS/cm
💧 Watering / Solution Maintenance
Schedule: Top-up daily; full change every 7–10 days
Top-up: Maintain solution level; strong aeration
pH 5.8–6.5; EC 1.4–2.0 mS/cm
🧪 Nutrients
Type: Leafy green nutrient (A+B) with micronutrients
Frequency: Adjust EC/pH 2–3x/week; change 7–10 days
Dosage/EC: EC 1.4–2.0 mS/cm; pH 5.8–6.5
🍓 Harvest
Start: 3–5 weeks from sowing
Seasonality: Year-round
Duration: Cut-and-come-again for several weeks
Harvest Indicators: Tender shoots 15–25 cm; leaves vibrant green
Tips: Harvest young for tenderness; avoid letting plants flower.
🌱 Propagation
Seeds direct sown in plugs; thin to one per site.
🐛 Pests & Diseases
- Leaf miners/aphids: Neem 1%; remove damaged leaves; maintain airflow.
🌦️ Seasonal Notes (Malaysia)
Shade net and airflow reduce heat stress and leaf diseases in monsoon.
📝 System Notes
Space 15–20 cm; avoid overcrowding for airflow.
💡 Extra Care Tips
- Stagger sowing every 1–2 weeks
- Supplement iron if new leaves pale
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.