Iceberg Lettuce (Lactuca Savita)

Seed types

• Danilo (bought at Hornbach)

Plant requirements

Germination phase

• Germination temperature: 20 - 24 degC
• Germination: 7 - 10 days
• Make sure you keep germinating seeds in cooler temperatures. Gradually adjust them to warmer temperatures before transplanting them to your hydroponic system

Seedling phase

• Seedlings: 100 μmol/m²/s (PPFD)
• Seedlings lighting interval: 18 hours
• Seedling development: 2 - 3 weeks

Transplanting phase

• Use similar conditions during transplanting (temp, light)
• Transplanting: >3 - 4 true leaves + grown to 5 - 8 cm tall + long enough roots

Mature phase

• Vegetative/Mature Stages: 200-300 μmol/m²/s (PPFD)
• Mature stage: 12-16 hours of light per day, with 8-12 hours of darkness
• Sowing to harvest: 7 - 10 weeks

General requirements

• Light height: 8 - 12 inch (20 - 30 cm)
• DLI of 11.5 mol/m2/day
• Best grow temperature: 10 - 21 degC
• Bolting above: 21-24 degC!
• Nutrient Root Zone Temperature: 15 - 21 degC
• Nutrient volume: 4 - 6 liter
• pH range: 5.5 - 6.5
• EC range: 0.8 - 1.2 mS/cm
• Nutrients: Plenty of nitrogen (N), some phosphorus (P), but not much potassium (K)