What is Greenhouse Farming?
Greenhouse farming is a modern agricultural system where crops are grown inside a controlled environment structure covered with transparent material (plastic or glass). It allows farmers to regulate temperature, humidity, irrigation, and pests.
In hot regions like Lagos State and Oyo State, greenhouse farming makes it possible to grow temperate crops like strawberries, lettuce, cucumber, and sweet peppers successfully.
Why Greenhouse Farming is Important in Nigeria
- Controls excessive heat and rainfall
- Reduces pest attacks
- Enables year-round farming
- Increases yield per square meter
- Produces premium-quality crops
- Reduces crop failure risk
It is especially useful in urban and peri-urban areas where land is limited.
Types of Greenhouses Suitable for Nigeria
A. Low-Cost Tunnel Greenhouse
- Affordable
- Suitable for beginners
- Less climate control
B. Standard Polyethylene Greenhouse
- Most common in Nigeria
- Covered with UV-treated nylon
- Suitable for strawberries, tomatoes, peppers
C. Advanced Climate-Controlled Greenhouse
- Automated temperature & humidity control
- Higher cost
- Used for commercial export farming
Crops Suitable for Greenhouse Farming in Nigeria
- Strawberries
- Tomatoes
- Cucumbers
- Bell peppers
- Lettuce
- Spinach
- Herbs
Steps to Start Greenhouse Farming
Step 1: Feasibility Study
- Market demand
- Target buyers (supermarkets, hotels, restaurants)
- Crop selection
- Capital assessment
Step 2: Secure Land
- Flat, well-drained location
- Accessible to water source
- Close to target market
Step 3: Install Greenhouse Structure
Cost depends on size:
- Small (8m x 24m): ₦4M – ₦7M
- Medium: ₦8M – ₦15M
Ensure:
- UV-treated nylon covering
- Insect net
- Proper ventilation
- Drip irrigation system
Step 4: Soil Preparation
- Use sandy loam soil
- Add organic manure
- Install raised beds
- Apply plastic mulch
Step 5: Install Drip Irrigation
Drip irrigation:
- Saves water
- Prevents fungal diseases
- Improves yield
Climate Control Management
Ideal greenhouse conditions:
- Temperature: 18°C – 28°C
- Humidity: 60% – 80%
- Good air circulation
Use:
- Side ventilation nets
- Shade nets during extreme heat
- Exhaust fans (for advanced systems)
Pest and Disease Management
Common issues:
- Aphids
- Whiteflies
- Fungal infections
Prevention methods:
- Use insect netting
- Maintain hygiene
- Apply organic pesticides
- Avoid overwatering
Irrigation & Fertilization
- Use drip irrigation
- Apply soluble NPK fertilizers
- Practice fertigation (mixing fertilizer in irrigation water)
- Monitor soil pH (5.5 – 6.5 for strawberries)
Harvesting & Post-Harvest Handling
- Harvest early morning
- Avoid squeezing fruits
- Use ventilated crates
- Store in cool environment (2–5°C for strawberries)
Cold storage increases shelf life and reduces losses.
Cost Overview (Small Commercial Unit)
| Item | Estimated Cost (₦) |
|---|---|
| Greenhouse Structure | 4M – 8M |
| Drip Irrigation | 500k – 1M |
| Seedlings | 500k – 1.5M |
| Fertilizers & Chemicals | 300k – 600k |
| Labour | 400k – 800k |
Total startup may range between:
₦6M – ₦12M
1 Profit Potential
Greenhouse farming produces:
- Higher yield per square meter
- Premium market price
- 2–3 cycles per year (depending on crop)
Return on investment can occur within 6–12 months with proper market linkage.
1 Common Mistakes to Avoid
- Poor ventilation design
- Lack of market before planting
- Using low-quality seedlings
- Overwatering crops
- Ignoring pest preventionstra
