Water-soluble hydroponic fertilizer formulated specifically for lettuce production. MasterBlend 8-15-36 Lettuce Formula is part of a 2 or 3-part nutrient system that provides complete balanced nutrition for leafy greens in hydroponic, aquaponic, and fertigation systems. When combined with calcium nitrate and magnesium sulfate, it delivers the complete nutrient profile needed for rapid vegetative growth, vibrant leaf color, and consistent head formation in commercial and hobby lettuce operations.

Lettuce-Specific Nutrient Formulation

The 8-15-36 NPK ratio delivers higher phosphorus and potassium levels ideal for lettuce production. Phosphorus supports strong root development and energy transfer, while elevated potassium enhances leaf quality, crispness, and shelf life. The moderate nitrogen level promotes steady vegetative growth without excessive leaf expansion that can reduce quality.

Key Features

• NPK analysis: 8-15-36 (nitrogen-phosphorus-potassium)
• Formulated specifically for lettuce and leafy greens
• Part of a 2 or 3-part complete nutrient system
• 100% water-soluble for complete dissolution
• No fallout or clogging in irrigation systems
• Compatible with hydroponic, aquaponic, and fertigation systems
• Includes essential micronutrients
• Suitable for NFT, DWC, ebb and flow, and drip systems
• Professional-grade commercial formulation

Application - 2 or 3-Part Nutrient System

This product must be used with calcium nitrate and magnesium sulfate to create a complete plant nutrient solution. MasterBlend 8-15-36 Lettuce Formula alone does not provide all essential nutrients.

2-Part System: Combine MasterBlend 8-15-36 with calcium nitrate for a complete nutrient solution.

3-Part System (Recommended): Combine MasterBlend 8-15-36 with calcium nitrate and magnesium sulfate (Epsom salt) for optimal nutrition.

Typical mixing ratio: For each gallon of nutrient solution, dissolve separately then combine:
- MasterBlend 8-15-36: 1-2 grams
- Calcium Nitrate: 1-2 grams
- Magnesium Sulfate: 0.5-1 gram

Adjust concentrations based on crop stage, variety, and environmental conditions. Monitor EC and pH regularly. Important: Always dissolve each component separately in water before combining to prevent nutrient lockout.

Ideal For

Lettuce varieties (butterhead, romaine, leaf, iceberg), spinach, arugula, kale, chard, and other leafy greens. Suitable for commercial greenhouse production, vertical farms, aquaponic systems, and home hydroponic gardens. Works in all hydroponic system types including NFT (nutrient film technique), DWC (deep water culture), ebb and flow, and drip irrigation.

Specifications

• NPK ratio: 8-15-36
• Form: Water-soluble powder
• Solubility: 100% (no residue)
• Package size: 25 lb bag
• Weight: 26 lb (including packaging)
• SKU: MB-Lettuce-25lb.

Complete Nutrient System Requirements

Required components for complete nutrition:

• MasterBlend 8-15-36 Lettuce Formula (this product)
• Calcium Nitrate (sold separately)
• Magnesium Sulfate / Epsom Salt (sold separately)

Store in cool, dry location away from moisture. Keep components separate until ready to mix.

Documentation

• Product Label (PDF)