19/03/2026
Tips for healthy onions
Here are practical, farmer-friendly tips to grow healthy, high-yield onions—especially suited for conditions like those in Nairobi and similar regions:
🌱 1. Choose the Right Variety
Go for varieties suited to your climate (e.g., Red Creole, Bombay Red, Jambar F1).
Use certified, disease-free seeds or seedlings.
🌿 2. Prepare the Soil Well
Onions thrive in well-drained, fertile loamy soil.
Ideal soil pH: 6.0 – 7.0.
Add well-decomposed manure before planting (NOT fresh manure).
💧 3. Proper Watering
Keep soil consistently moist, especially during bulb formation.
Avoid overwatering → causes rotting and fungal diseases.
Reduce watering as bulbs mature to improve storage quality.
🌞 4. Adequate Spacing
Spacing: 10 cm between plants, 30 cm between rows.
Proper spacing prevents disease and allows bulb expansion.
🌾 5. W**d Control
Onions compete poorly with weeds.
W**d regularly, especially in the first 6–8 weeks.
Mulching helps conserve moisture and suppress weeds.
🧪 6. Fertilizer Management
Apply DAP or NPK at planting.
Top-dress with CAN (Calcium Ammonium Nitrate) after 3–4 weeks.
Avoid excess nitrogen → leads to big leaves but small bulbs.
🐛 7. Pest & Disease Control
Common pests:
Thrips → cause silvery leaves
Onion flies
Diseases:
Downy mildew
Purple blotch
Control tips:
Practice crop rotation
Use recommended pesticides/fungicides when necessary
Maintain field hygiene
🔄 8. Practice Crop Rotation
Avoid planting onions repeatedly in the same field.
Rotate with crops like maize or legumes to reduce disease buildup.
✂️ 9. Proper Harvesting
Harvest when tops fall over naturally.
Do not bend leaves manually—it affects bulb development.
Cure onions in a dry, shaded place for 10–14 days.
📦 10. Storage Tips
Store in a cool, dry, well-ventilated area.
Use mesh bags or crates—not sacks—to prevent rotting.
Visit www.myshambaexpress.com for more tips