- Description
Description
MasterBlend 4-18-38 Tomato Formula is a professional-grade, 100% water-soluble fertilizer specifically designed for tomatoes, peppers, cucumbers and other fruiting vegetables. It provides a balanced blend of macro and micronutrients optimized for heavy fruit set, strong roots, and high-quality yields in hydroponics, soil, and greenhouse systems.Â
Key Features & NPK Ratio
- NPK Analysis: 4% Nitrogen (N), 18% Available Phosphate (Pâ‚‚Oâ‚…), and 38% Soluble Potash (Kâ‚‚O).
- High Phosphorus: Boosts strong root development, blossoming, and initial fruit set.
- High Potassium: Improves fruit size, firmness, flavor, and shelf life.
- Low/Moderate Nitrogen: Encourages healthy green growth without excess foliage.
- Clog-Free Design: Dissolves completely with zero residue, protecting drip emitters and automated injectors.Â
Required 3-Part System
This product is part of a complete multi-part regimen and must be paired with other elements for full nutrition:Â
- MasterBlend 4-18-38 (Primary macro/micronutrients)
- Calcium Nitrate (Provides extra nitrogen and calcium)
- Magnesium Sulfate / Epsom Salt (Provides magnesium and sulfur)Â
Common Mixing Guidelines
- Typically mixed in a ratio of 2 parts MasterBlend : 2 parts Calcium Nitrate : 1 part Epsom Salt by weight.
- Standard mixing for 1 gallon of water calls for dissolving about 2 to 3 grams of MasterBlend, 2 to 3 grams of Calcium Nitrate, and 1 to 1.5 grams of Magnesium Sulfate separately before combining












