How to grow herbs hydroponically
Growing herbs hydroponically is one of the easiest and most rewarding ways to start hydroponics. Herbs grow quickly, require minimal space, and thrive in controlled environments. Here's a detailed guide to help you get started:
How to Grow Herbs Hydroponically
1. Choose the Right Herbs
Most herbs grow exceptionally well in hydroponics. Great starter herbs include:
Basil (most popular)
Mint (vigorous grower)
Parsley
Cilantro
Chives
Oregano
Thyme
Dill
2. Select a Hydroponic System
Ideal systems for herbs:
✅ Kratky Method (Passive) – Best for beginners. No electricity, simple setup.
✅ Deep Water Culture (DWC) – Easy, low maintenance.
✅ Nutrient Film Technique (NFT) – Great for commercial or stacked systems.
✅ Ebb and Flow (Flood and Drain) – Works well for larger or mixed plantings.
✅ Aeroponics – Advanced, fast growth, but requires more management.
3. Light Requirements
14-16 hours of light per day
Full-spectrum LED grow lights are recommended for indoor systems.
Keep lights 6-12 inches above the canopy for optimal growth.
4. Nutrient Solution
pH Range: 5.5 – 6.5
EC (Electrical Conductivity): 1.0 – 1.6 mS/cm
Herbs don’t need heavy feeding; mild nutrient solutions work well.
Use balanced hydroponic nutrients or formulas labeled for leafy greens.
5. Temperature and Humidity
Ideal Temp: 65-75°F (18-24°C)
Humidity: 40-60%
Air circulation helps prevent mold and mildew.
6. Water and Oxygen
Use an air pump and air stone if not using a passive system (like Kratky).
Regularly check water levels and top off with fresh, pH-balanced water.
Change nutrient solution every 2-3 weeks to prevent nutrient imbalances.
7. Spacing
4-8 inches apart depending on herb size.
Fast-growing herbs like basil need more room than compact herbs like thyme.
8. Harvesting
Start harvesting when herbs reach about 6 inches tall.
Cut no more than 1/3 of the plant at a time to encourage regrowth.
Frequent harvesting promotes bushier, healthier plants.
9. Common Problems
Leggy Growth: Not enough light; move lights closer.
Yellowing Leaves: Nutrient deficiency or pH imbalance.
Pests: Rare indoors, but watch for aphids and fungus gnats.
👉 Pro Tips:
Herbs like mint can overtake a system—consider planting them in separate containers.
Use net pots and clay pebbles for easy transplanting and good root support.
The Kratky method is a great low-tech option for kitchen herbs.